about:tracing support for TRACE_ASYNC_START/FINISH events.

Review URL: http://codereview.chromium.org/9706010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126978 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/tracing/linux_perf_importer.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -191,6 +191,13 @@ cr.define('tracing', function() {
       this.buildPerThreadCpuSlicesFromCpuState();
     },
 
+    /**
+     * Called by the TimelineModel after all other importers have imported their
+     * events.
+     */
+    finalizeImport: function() {
+    },
+
     /**
      * Builds the cpuSlices array on each thread based on our knowledge of what
      * each Cpu is doing.  This is done only for TimelineThreads that are

chrome/browser/resources/tracing/tests/nonnested_trace.json

-[
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 826, "ph": "B",
-      "name": "A", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 827, "ph": "B",
-      "name": "Asub", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 829, "ph": "B",
-      "name": "NonNest", "args": {"id": "1", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 830, "ph": "B",
-      "name": "NonNest", "args": {"id": "2", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 831, "ph": "E",
-      "name": "Asub", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 832, "ph": "E",
-      "name": "NonNest", "args": {"id": "1", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 833, "ph": "E",
-      "name": "NonNest", "args": {"id": "2", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 834, "ph": "E",
-      "name": "A", "args": {}},
-
-  {"cat": "PERF", "pid": 22630, "tid": 22631, "ts": 827, "ph": "B",
-      "name": "A", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22631, "ts": 854, "ph": "E",
-      "name": "A", "args": {}}
-]
\ No newline at end of file

chrome/browser/resources/tracing/timeline.css

 /*
-Copyright (c) 2012 The Chromium Authors. All rights reserved.
-Use of this source code is governed by a BSD-style license that can be
-found in the LICENSE file.
-*/
+ * Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+.timeline * {
+  -webkit-user-select: none;
+  cursor: default;
+}
 
 .timeline-drag-box {
   background-color: rgba(0, 0, 255, 0.25);
@@ -15,6 +20,27 @@ found in the LICENSE file.
   -webkit-box-orient: vertical;
   display: -webkit-box;
   padding: 1px 0;
+  position: relative;
+}
+
+.timeline-track-close-button {
+  left: 0px;
+  position: absolute;
+  top: 0px;
+}
+
+.timeline-track-button {
+  color: rgba(0,0,0,0.1);
+  font-size: 10px;
+  height: 12px;
+  text-align: center;
+  width: 12px;
+}
+.timeline-track-button:hover {
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-radius: 25%;
+  box-shadow: 0 0 .05em rgba(0,0,0,0.4);
+  color: rgba(0,0,0,0.5);
 }
 
 .timeline-thread-track:not(:first-child) {
@@ -61,4 +87,5 @@ found in the LICENSE file.
 
 .timeline-counter-track {
   height: 30px;
+  position: relative;
 }

chrome/browser/resources/tracing/timeline.js

@@ -396,7 +396,7 @@ cr.define('tracing', function() {
         threads.forEach(function(thread) {
           var track = new tracing.TimelineThreadTrack();
           track.heading = thread.userFriendlyName + ':';
-          track.tooltip = thread.userFriendlyDetials;
+          track.tooltip = thread.userFriendlyDetails;
           track.headingWidth = maxHeadingWidth;
           track.viewport = this.viewport_;
           track.thread = thread;
@@ -661,16 +661,17 @@ cr.define('tracing', function() {
     },
 
     onMouseDown_: function(e) {
-      rect = this.tracks_.getClientRects()[0];
+      var canv = this.firstCanvas;
+      var rect = this.tracks_.getClientRects()[0];
       var inside = rect &&
           e.clientX >= rect.left &&
           e.clientX < rect.right &&
           e.clientY >= rect.top &&
-          e.clientY < rect.bottom;
+          e.clientY < rect.bottom &&
+          e.x >= canv.offsetLeft;
       if (!inside)
         return;
 
-      var canv = this.firstCanvas;
       var pos = {
         x: e.clientX - canv.offsetLeft,
         y: e.clientY - canv.offsetTop
@@ -743,6 +744,10 @@ cr.define('tracing', function() {
     },
 
     onDblClick_: function(e) {
+      var canv = this.firstCanvas;
+      if (e.x < canv.offsetLeft)
+        return;
+
       var scale = 4;
       if (e.shiftKey)
         scale = 1 / scale;

chrome/browser/resources/tracing/timeline_model_test.html

@@ -18,44 +18,47 @@ found in the LICENSE file.
 </head>
 <body>
 <script>
+'use strict';
 var TimelineCpu = tracing.TimelineCpu;
 var TimelineSlice = tracing.TimelineSlice;
+var TimelineThreadSlice = tracing.TimelineThreadSlice;
 var TimelineProcess = tracing.TimelineProcess;
 var TimelineThread = tracing.TimelineThread;
 var TimelineModel = tracing.TimelineModel;
+var TimelineAsyncSlice = tracing.TimelineAsyncSlice;
+var TimelineAsyncSliceGroup = tracing.TimelineAsyncSliceGroup;
+
+// Helper function to create a slice.
+function newAsyncSlice(start, duration, startThread, endThread) {
+  var s = new TimelineAsyncSlice('a', 0, start);
+  s.duration = duration;
+  s.startThread = startThread;
+  s.endThread = endThread;
+  return s;
+}
 
 function testThreadBounds_Empty() {
-  var t = new TimelineThread(undefined, 1);
+  var t = new TimelineThread(new TimelineProcess(7), 1);
   t.updateBounds();
   assertEquals(undefined, t.minTimestamp);
   assertEquals(undefined, t.maxTimestamp);
 }
 
 function testThreadBounds_SubRow() {
-  var t = new TimelineThread(undefined, 1);
-  t.subRows[0].push(new TimelineSlice('a', 0, 1, {}, 3));
+  var t = new TimelineThread(new TimelineProcess(7), 1);
+  t.subRows[0].push(new TimelineThreadSlice('a', 0, 1, {}, 3));
   t.updateBounds();
   assertEquals(1, t.minTimestamp);
   assertEquals(4, t.maxTimestamp);
 }
 
-function testThreadBounds_NestedSubrow() {
-  var t = new TimelineThread(undefined, 1);
-  t.nonNestedSubRows.push([]);
-  t.nonNestedSubRows[0].push(new TimelineSlice('a', 0, 1, {}, 3));
+function testThreadBounds_AsyncSliceGroup() {
+  var t = new TimelineThread(new TimelineProcess(7), 1);
+  t.subRows[0].push(new TimelineThreadSlice('a', 0, 1, {}, 3));
+  t.asyncSlices.push(newAsyncSlice(0.1, 5, t, t));
   t.updateBounds();
-  assertEquals(1, t.minTimestamp);
-  assertEquals(4, t.maxTimestamp);
-}
-
-function testThreadBounds_SubRowAndNonNestedSubRow() {
-  var t = new TimelineThread(undefined, 1);
-  t.subRows[0].push(new TimelineSlice('a', 0, 0.5, {}, 3));
-  t.nonNestedSubRows.push([]);
-  t.nonNestedSubRows[0].push(new TimelineSlice('b', 0, 1, {}, 4.5));
-  t.updateBounds();
-  assertEquals(0.5, t.minTimestamp);
-  assertEquals(5.5, t.maxTimestamp);
+  assertEquals(0.1, t.minTimestamp);
+  assertEquals(5.1, t.maxTimestamp);
 }
 
 function testModelBounds_EmptyModel() {
@@ -73,10 +76,10 @@ function testModelBounds_OneEmptyThread() {
   assertEquals(undefined, m.maxTimestamp);
 }
 
-function testModelBounds_OneThrad() {
+function testModelBounds_OneThread() {
   var m = new TimelineModel();
   var t = m.getOrCreateProcess(1).getOrCreateThread(1);
-  t.subRows[0].push(new TimelineSlice('a', 0, 1, {}, 3));
+  t.subRows[0].push(new TimelineThreadSlice('a', 0, 1, {}, 3));
   m.updateBounds();
   assertEquals(1, m.minTimestamp);
   assertEquals(4, m.maxTimestamp);
@@ -85,7 +88,7 @@ function testModelBounds_OneThrad() {
 function testModelBounds_OneThreadAndOneEmptyThread() {
   var m = new TimelineModel();
   var t1 = m.getOrCreateProcess(1).getOrCreateThread(1);
-  t1.subRows[0].push(new TimelineSlice('a', 0, 1, {}, 3));
+  t1.subRows[0].push(new TimelineThreadSlice('a', 0, 1, {}, 3));
   var t2 = m.getOrCreateProcess(1).getOrCreateThread(1);
   m.updateBounds();
   assertEquals(1, m.minTimestamp);
@@ -99,7 +102,6 @@ function testCpuBounds_Empty() {
   assertEquals(undefined, cpu.maxTimestamp);
 }
 
-
 function testCpuBounds_OneSlice() {
   var cpu = new TimelineCpu(undefined, 1);
   cpu.slices.push(new TimelineSlice('a', 0, 1, {}, 3));
@@ -109,16 +111,120 @@ function testCpuBounds_OneSlice() {
 }
 
 function testModelBounds_OneCpu() {
+  var m = new TimelineModel();
+  var cpu = m.getOrCreateCpu(1);
+  cpu.slices.push(new TimelineSlice('a', 0, 1, {}, 3));
+  m.updateBounds();
+  assertEquals(1, m.minTimestamp);
+  assertEquals(4, m.maxTimestamp);
 }
 
 
 function testModelBounds_OneCpuOneThread() {
+  var m = new TimelineModel();
+  var cpu = m.getOrCreateCpu(1);
+  cpu.slices.push(new TimelineSlice('a', 0, 1, {}, 3));
+
+  var t = m.getOrCreateProcess(1).getOrCreateThread(1);
+  t.subRows[0].push(new TimelineThreadSlice('a', 0, 1, {}, 4));
+
+  m.updateBounds();
+  assertEquals(1, m.minTimestamp);
+  assertEquals(5, m.maxTimestamp);
+}
+
+function testPTIDFromPidAndTid() {
+  assertEquals('1:2', TimelineThread.getPTIDFromPidAndTid(1, 2));
+}
+
+function testAsyncSliceGroupBounds_Empty() {
+  var g = new TimelineAsyncSliceGroup(name);
+  g.updateBounds();
+  assertEquals(undefined, g.minTimestamp);
+  assertEquals(undefined, g.maxTimestamp);
+}
+
+function testAsyncSliceGroupBounds_Basic() {
+  var p1 = new TimelineProcess(1);
+  var t1 = new TimelineThread(p1, 1);
+  var g = new TimelineAsyncSliceGroup('a');
+  g.push(newAsyncSlice(0, 1, t1, t1));
+  g.push(newAsyncSlice(1, 1.5, t1, t1));
+  assertEquals(2, g.length);
+  g.updateBounds();
+  assertEquals(0, g.minTimestamp);
+  assertEquals(2.5, g.maxTimestamp);
+}
+
+function testAsyncSliceGroup_rebuildSubRows_twoNonOverlappingSlices() {
+  var p1 = new TimelineProcess(1);
+  var t1 = new TimelineThread(p1, 1);
+  var g = new TimelineAsyncSliceGroup('a');
+  g.slices.push(newAsyncSlice(0, 1, t1, t1));
+  g.slices.push(newAsyncSlice(1, 1, t1, t1));
+
+  assertEquals(1, g.subRows.length);
+  assertEquals(2, g.subRows[0].length);
+  assertEquals(g.slices[0], g.subRows[0][0]);
+  assertEquals(g.slices[1], g.subRows[0][1]);
+}
+
+function testAsyncSliceGroup_rebuildSubRows_twoOverlappingSlices() {
+  var p1 = new TimelineProcess(1);
+  var t1 = new TimelineThread(p1, 1);
+  var g = new TimelineAsyncSliceGroup('a');
+  g.slices.push(newAsyncSlice(0, 1, t1, t1));
+  g.slices.push(newAsyncSlice(0, 1.5, t1, t1));
+  g.updateBounds();
+
+  assertEquals(2, g.subRows.length);
+  assertEquals(1, g.subRows[0].length);
+  assertEquals(g.slices[0], g.subRows[0][0]);
+  assertEquals(1, g.subRows[1].length);
+  assertEquals(g.slices[1], g.subRows[1][0]);
+}
+
+function testAsyncSliceGroup_rebuildSubRows_threePartlyOverlappingSlices() {
+  var p1 = new TimelineProcess(1);
+  var t1 = new TimelineThread(p1, 1);
+  var g = new TimelineAsyncSliceGroup('a');
+  g.slices.push(newAsyncSlice(0, 1, t1, t1));
+  g.slices.push(newAsyncSlice(0, 1.5, t1, t1));
+  g.slices.push(newAsyncSlice(1, 1.5, t1, t1));
+  g.updateBounds();
+
+  assertEquals(2, g.subRows.length);
+  assertEquals(2, g.subRows[0].length);
+  assertEquals(g.slices[0], g.subRows[0][0]);
+  assertEquals(g.slices[2], g.subRows[0][1]);
+  assertEquals(1, g.subRows[1].length);
+  assertEquals(g.slices[1], g.subRows[1][0]);
+}
+
+function testAsyncSliceGroup_computeSubGroups_twoThreadSpecificSlices() {
+  var p1 = new TimelineProcess(1);
+  var t1 = new TimelineThread(p1, 1);
+  var t2 = new TimelineThread(p1, 2);
+  var g = new TimelineAsyncSliceGroup('a');
+  g.slices.push(newAsyncSlice(0, 1, t1, t1));
+  g.slices.push(newAsyncSlice(0, 1, t2, t2));
+
+  var subGroups = g.computeSubGroups();
+  assertEquals(2, subGroups.length);
+
+  assertEquals(g.name, subGroups[0].name);
+  assertEquals(1, subGroups[0].slices.length);
+  assertEquals(g.slices[0], subGroups[0].slices[0]);
+
+  assertEquals(g.name, subGroups[1].name);
+  assertEquals(1, subGroups[1].slices.length);
+  assertEquals(g.slices[1], subGroups[1].slices[0]);
 }
 
 function testModelCanImportEmpty() {
   var m;
   m = new TimelineModel([]);
-  m = new TimelineModel("");
+  m = new TimelineModel('');
 }
 </script>
 </body>

chrome/browser/resources/tracing/timeline_test.html

 <!DOCTYPE HTML>
 <html>
 <!--
-Copyright (c) 2011 The Chromium Authors. All rights reserved.
+Copyright (c) 2012 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
@@ -35,9 +35,6 @@ found in the LICENSE file.
   <div class="timeline-test" src="./tests/instance_counters.json">
   </div>
 
-  <div class="timeline-test" src="./tests/nonnested_trace.json">
-  </div>
-
   <div class="timeline-test" src="./tests/tall_trace.json">
   </div>
 
@@ -50,7 +47,7 @@ found in the LICENSE file.
   <div class="timeline-test" src="./tests/main_thread_has_unclosed_slices.json">
   </div>
 
-  <div class="timeline-test" src="./tests/linux_perf_simple.txt">
+  <div class="timeline-test" src="./tests/async_begin_end.json">
   </div>
 
   <script>

chrome/browser/resources/tracing/timeline_track.js

@@ -111,6 +111,17 @@ cr.define('tracing', function() {
     }
   };
 
+  function addCloseButtonElement(el) {
+    var closeEl = document.createElement('div');
+    closeEl.classList.add('timeline-track-button');
+    closeEl.classList.add('timeline-track-close-button');
+    closeEl.textContent = String.fromCharCode(215); // ×
+    closeEl.addEventListener('click', function() {
+      el.style.display = 'None';
+    });
+    el.appendChild(closeEl);
+  }
+
   /**
    * Visualizes a TimelineThread using a series of of TimelineSliceTracks.
    * @constructor
@@ -181,12 +192,18 @@ cr.define('tracing', function() {
           track.height = '4px';
         }
 
-        for (var srI = 0; srI < this.thread_.nonNestedSubRows.length; ++srI) {
-          this.addTrack_(this.thread_.nonNestedSubRows[srI]);
+        if (this.thread_.asyncSlices.length) {
+          var subRows = this.thread_.asyncSlices.subRows;
+          for (var srI = 0; srI < subRows.length; srI++) {
+            var track = this.addTrack_(subRows[srI]);
+            track.asyncStyle = true;
+          }
         }
-        for (var srI = 0; srI < this.thread_.subRows.length; ++srI) {
+
+        for (var srI = 0; srI < this.thread_.subRows.length; srI++) {
           this.addTrack_(this.thread_.subRows[srI]);
         }
+
         if (this.tracks_.length > 0) {
           if (this.thread_.cpuSlices) {
             this.tracks_[1].heading = this.heading_;
@@ -197,6 +214,7 @@ cr.define('tracing', function() {
           }
         }
       }
+      addCloseButtonElement(this);
     }
   };
 
@@ -264,6 +282,7 @@ cr.define('tracing', function() {
         this.tracks_[0].heading = this.heading_;
         this.tracks_[0].tooltip = this.tooltip_;
       }
+      addCloseButtonElement(this);
     }
   };
 
@@ -366,58 +385,63 @@ cr.define('tracing', function() {
 
   };
 
-   /**
-     * A pair representing an elided string and world-coordinate width
-     * to draw it.
-     * @constructor
+  /**
+   * A pair representing an elided string and world-coordinate width
+   * to draw it.
+   * @constructor
      */
-   function ElidedStringWidthPair(string, width) {
-     this.string = string;
-     this.width = width;
-   }
+  function ElidedStringWidthPair(string, width) {
+    this.string = string;
+    this.width = width;
+  }
 
+  /**
+   * A cache for elided strings.
+   * @constructor
+   */
+  function ElidedTitleCache() {
+  }
+
+  ElidedTitleCache.prototype = {
     /**
-    * A cache for elided strings.
-    * @constructor
-    */
-   function ElidedTitleCache() {
-   }
-
-   ElidedTitleCache.prototype = {
-     /**
-      * Return elided text.
-      * @param {track} A timeline slice track or other object that defines
-      *                functions labelWidth() and labelWidthWorld().
-      * @param {pixWidth} Pixel width.
-      * @param {title} Original title text.
-      * @param {width} Drawn width in world coords.
-      * @param {sliceDuration} Where the title must fit (in world coords).
-      * @return {ElidedStringWidthPair} Elided string and width.
-      */
-     get: function(track, pixWidth, title, width, sliceDuration) {
-       var elidedDict = elidedTitleCacheDict[title];
-       if (!elidedDict) {
-         elidedDict = {};
-         elidedTitleCacheDict[title] = elidedDict;
-       }
-       var stringWidthPair = elidedDict[sliceDuration];
-       if (stringWidthPair === undefined) {
-          var newtitle = title;
-          var elided = false;
-          while (track.labelWidthWorld(newtitle, pixWidth) > sliceDuration) {
-            newtitle = newtitle.substring(0, newtitle.length * 0.75);
-            elided = true;
-          }
-          if (elided && newtitle.length > 3)
-            newtitle = newtitle.substring(0, newtitle.length - 3) + '...';
-         stringWidthPair = new ElidedStringWidthPair(
-                             newtitle,
-                             track.labelWidth(newtitle));
-         elidedDict[sliceDuration] = stringWidthPair;
-       }
-       return stringWidthPair;
-     },
-   };
+     * Return elided text.
+     * @param {track} A timeline slice track or other object that defines
+     *                functions labelWidth() and labelWidthWorld().
+     * @param {pixWidth} Pixel width.
+     * @param {title} Original title text.
+     * @param {width} Drawn width in world coords.
+     * @param {sliceDuration} Where the title must fit (in world coords).
+     * @return {ElidedStringWidthPair} Elided string and width.
+     */
+    get: function(track, pixWidth, title, width, sliceDuration) {
+      var elidedDict = elidedTitleCacheDict[title];
+      if (!elidedDict) {
+        elidedDict = {};
+        elidedTitleCacheDict[title] = elidedDict;
+      }
+      var elidedDictForPixWidth = elidedDict[pixWidth];
+      if (!elidedDictForPixWidth) {
+        elidedDict[pixWidth] = {};
+        elidedDictForPixWidth = elidedDict[pixWidth];
+      }
+      var stringWidthPair = elidedDictForPixWidth[sliceDuration];
+      if (stringWidthPair === undefined) {
+        var newtitle = title;
+        var elided = false;
+        while (track.labelWidthWorld(newtitle, pixWidth) > sliceDuration) {
+          newtitle = newtitle.substring(0, newtitle.length * 0.75);
+          elided = true;
+        }
+        if (elided && newtitle.length > 3)
+          newtitle = newtitle.substring(0, newtitle.length - 3) + '...';
+        stringWidthPair = new ElidedStringWidthPair(
+            newtitle,
+            track.labelWidth(newtitle));
+        elidedDictForPixWidth[sliceDuration] = stringWidthPair;
+      }
+      return stringWidthPair;
+    }
+  };
 
   /**
    * A track that displays an array of TimelineSlice objects.
@@ -431,18 +455,28 @@ cr.define('tracing', function() {
 
     __proto__: CanvasBasedTrack.prototype,
 
-   /**
-    * Should we elide text on trace labels?
-    * Without eliding, text that is too wide isn't drawn at all.
-    * Disable if you feel this causes a performance problem.
-    * This is a default value that can be overridden in tracks for testing.
-    * @const
-    */
+    /**
+     * Should we elide text on trace labels?
+     * Without eliding, text that is too wide isn't drawn at all.
+     * Disable if you feel this causes a performance problem.
+     * This is a default value that can be overridden in tracks for testing.
+     * @const
+     */
     SHOULD_ELIDE_TEXT: true,
 
     decorate: function() {
       this.classList.add('timeline-slice-track');
       this.elidedTitleCache = new ElidedTitleCache();
+      this.asyncStyle_ = false;
+    },
+
+    get asyncStyle() {
+      return this.asyncStyle_;
+    },
+
+    set asyncStyle(v) {
+      this.asyncStyle_ = !!v;
+      this.invalidate();
     },
 
     get slices() {
@@ -503,6 +537,8 @@ cr.define('tracing', function() {
       vp.applyTransformToCanavs(ctx);
 
       // Slices.
+      if (this.asyncStyle_)
+        ctx.globalAlpha = 0.25;
       var tr = new tracing.FastRectRenderer(ctx, viewLWorld, 2 * pixWidth,
                                             2 * pixWidth, viewRWorld, pallette);
       tr.setYandH(0, canvasH);
@@ -560,12 +596,12 @@ cr.define('tracing', function() {
             var drawnWidth = this.labelWidth(drawnTitle);
             if (shouldElide &&
                 this.labelWidthWorld(drawnTitle, pixWidth) > slice.duration) {
-                var elidedValues = this.elidedTitleCache.get(
-                    this, pixWidth,
-                    drawnTitle, drawnWidth,
-                    slice.duration);
-                drawnTitle = elidedValues.string;
-                drawnWidth = elidedValues.width;
+              var elidedValues = this.elidedTitleCache.get(
+                  this, pixWidth,
+                  drawnTitle, drawnWidth,
+                  slice.duration);
+              drawnTitle = elidedValues.string;
+              drawnWidth = elidedValues.width;
             }
             if (drawnWidth * pixWidth < slice.duration) {
               var cX = vp.xWorldToView(slice.start + 0.5 * slice.duration);
@@ -691,7 +727,7 @@ cr.define('tracing', function() {
 
   const logOf10 = Math.log(10);
   function log10(x) {
-    return Math.log(x) / logOf10;;
+    return Math.log(x) / logOf10;
   }
 
   TimelineViewportTrack.prototype = {
@@ -729,10 +765,10 @@ cr.define('tracing', function() {
       // exceeds the ideal mark distance.
       var divisors = [10, 5, 2, 1];
       for (var i = 0; i < divisors.length; ++i) {
-        var tightenedGuess = conservativeGuess / divisors[i]
+        var tightenedGuess = conservativeGuess / divisors[i];
         if (vp.xWorldVectorToView(tightenedGuess) < idealMajorMarkDistancePix)
           continue;
-        majorMarkDistanceWorld = conservativeGuess / divisors[i-1];
+        majorMarkDistanceWorld = conservativeGuess / divisors[i - 1];
         break;
       }
       if (majorMarkDistanceWorld < 100) {
@@ -748,8 +784,8 @@ cr.define('tracing', function() {
       var minorMarkDistancePx = vp.xWorldVectorToView(minorMarkDistanceWorld);
 
       var firstMajorMark =
-        Math.floor(viewLWorld / majorMarkDistanceWorld) *
-        majorMarkDistanceWorld;
+          Math.floor(viewLWorld / majorMarkDistanceWorld) *
+              majorMarkDistanceWorld;
 
       var minorTickH = Math.floor(canvasH * 0.25);
 
@@ -841,6 +877,7 @@ cr.define('tracing', function() {
 
     decorate: function() {
       this.classList.add('timeline-counter-track');
+      addCloseButtonElement(this);
     },
 
     get counter() {

chrome/browser/resources/tracing/timeline_track_test.html

@@ -40,15 +40,30 @@ found in the LICENSE file.
 <script>
 </script>
 <script>
+  var TimelineAsyncSlice = tracing.TimelineAsyncSlice;
+  var TimelineAsyncSliceGroup = tracing.TimelineAsyncSliceGroup;
   var TimelineCounter = tracing.TimelineCounter;
   var TimelineCounterTrack = tracing.TimelineCounterTrack;
   var TimelineCpu = tracing.TimelineCpu;
   var TimelineCpuTrack = tracing.TimelineCpuTrack;
+  var TimelineProcess = tracing.TimelineProcess;
   var TimelineSliceTrack = tracing.TimelineSliceTrack;
   var TimelineSlice = tracing.TimelineSlice;
+  var TimelineThread = tracing.TimelineThread;
+  var TimelineThreadSlice = tracing.TimelineThreadSlice;
+  var TimelineThreadTrack = tracing.TimelineThreadTrack;
   var TimelineViewport = tracing.TimelineViewport;
   var testDivs = {};
 
+  // Helper function to create a slice.
+  function newAsyncSlice(start, duration, startThread, endThread) {
+    var s = new TimelineAsyncSlice('a', 0, start);
+    s.duration = duration;
+    s.startThread = startThread;
+    s.endThread = endThread;
+    return s;
+  }
+
   function getTestDiv(name) {
     if (!testDivs[name]) {
       testDivs[name] = document.createElement('div');
@@ -74,6 +89,23 @@ found in the LICENSE file.
        track.clientWidth / (1.1 * track.slices[track.slices.length - 1].end));
   }
 
+  function testBasicSlicesWithAsyncFlag() {
+    var testEl = getTestDiv('testBasicSlicesWithAsyncFlag');
+    var track = TimelineSliceTrack();
+    testEl.appendChild(track);
+    track.asyncStyle = true;
+    track.heading = 'testBasicSlices+AsyncFlag';
+    track.slices = [
+      new TimelineSlice('a', 0, 1, {}, 1),
+      new TimelineSlice('b', 1, 2.1, {}, 4.8),
+      new TimelineSlice('b', 1, 7, {}, 0.5),
+      new TimelineSlice('c', 2, 7.6, {}, 0.4)
+    ];
+    track.viewport = new TimelineViewport(testEl);
+    track.viewport.setPanAndScale(0,
+       track.clientWidth / (1.1 * track.slices[track.slices.length - 1].end));
+  }
+
   function testShrinkingSliceSizes() {
     var testEl = getTestDiv('testShrinkingSliceSizes');
     var track = TimelineSliceTrack();
@@ -186,8 +218,8 @@ found in the LICENSE file.
 
   /* You'll need visual inspection to test eliding with this one. */
   function testElideVisualInspection() {
-    var optDicts = [ { trackName: 'elideOff', elide: false }, 
-                     { trackName: 'elideOn', elide: true } ];
+    var optDicts = [{ trackName: 'elideOff', elide: false },
+                    { trackName: 'elideOn', elide: true }];
     for (dictIndex in optDicts) {
       dict = optDicts[dictIndex];
       var testEl = getTestDiv(dict.trackName);
@@ -198,7 +230,7 @@ found in the LICENSE file.
         track.SHOULD_ELIDE_TEXT = false;
       }
       var tooLongTitle = 'Unless eliding this SHOULD NOT BE DISPLAYED.  ';
-      var bigTitle = 'Very big title name that goes on longer ' + 
+      var bigTitle = 'Very big title name that goes on longer ' +
                      'than you may expect';
       testEl.appendChild(track);
       track.heading = 'Visual: ' + dict.trackName;
@@ -219,7 +251,7 @@ found in the LICENSE file.
     var testEl = getTestDiv('testElide');
     var track = TimelineSliceTrack();
     testEl.appendChild(track);
-    var bigtitle = 'Super duper long long title ' + 
+    var bigtitle = 'Super duper long long title ' +
       'holy moly when did you get so verbose?';
     var smalltitle = 'small';
     track.viewport = new TimelineViewport(testEl);
@@ -227,26 +259,26 @@ found in the LICENSE file.
     track.slices = [
         // title, colorId, start, args, opt_duration
         new TimelineSlice(bigtitle, 0, 1, {}, 1),
-        new TimelineSlice(smalltitle, 1, 2, {}, 1),
+        new TimelineSlice(smalltitle, 1, 2, {}, 1)
     ];
     track.viewport = new TimelineViewport(testEl);
     track.viewport.setPanAndScale(0,
       track.clientWidth / (1.1 * track.slices[track.slices.length - 1].end));
     var stringWidthPair = undefined;
     var pixWidth = track.viewport_.xViewVectorToWorld(1);
-    
+
     // Small titles on big slices are not elided.
-    stringWidthPair = track.elidedTitleCache.get(track, pixWidth, smalltitle, 
+    stringWidthPair = track.elidedTitleCache.get(track, pixWidth, smalltitle,
       track.labelWidth(smalltitle), 1);
     assertEquals(smalltitle, stringWidthPair.string);
     // Keep shrinking the slice until eliding starts.
     var elidedWhenSmallEnough = false;
     for (var sliceLength = 1; sliceLength >= 0.00001; sliceLength /= 2.0) {
-      stringWidthPair = track.elidedTitleCache.get(track, pixWidth, smalltitle, 
+      stringWidthPair = track.elidedTitleCache.get(track, pixWidth, smalltitle,
         track.labelWidth(smalltitle), sliceLength);
       if (stringWidthPair.string.length < smalltitle.length) {
-	elidedWhenSmallEnough = true;
-	break;
+        elidedWhenSmallEnough = true;
+        break;
       }
     }
     assertTrue(elidedWhenSmallEnough);
@@ -256,12 +288,70 @@ found in the LICENSE file.
     for (var x = 0; x < 10; x++) {
       superBigTitle += bigtitle;
     }
-    stringWidthPair = track.elidedTitleCache.get(track, pixWidth, 
+    stringWidthPair = track.elidedTitleCache.get(track, pixWidth,
       superBigTitle, track.labelWidth(superBigTitle), 1);
     assertTrue(stringWidthPair.string.length < superBigTitle.length);
     // And elided text ends with ...
     var len = stringWidthPair.string.length;
-    assertEquals('...', stringWidthPair.string.substring(len-3, len));
+    assertEquals('...', stringWidthPair.string.substring(len - 3, len));
+  }
+
+  function testTimelineThreadTrackWithRegularSlices() {
+    var testEl = getTestDiv('testTimelineThreadTrackWithRegularSlices');
+    var track = TimelineThreadTrack();
+    testEl.appendChild(track);
+    track.heading = 'testTimelineThreadTrackWithRegularSlices';
+    var thread = new TimelineThread(new TimelineProcess(7), 1);
+    thread.subRows = [
+      [
+        new TimelineThreadSlice('a', 0, 1, {}, 1),
+        new TimelineThreadSlice('b', 1, 2.1, {}, 4.8),
+        new TimelineThreadSlice('b', 1, 7, {}, 0.5),
+        new TimelineThreadSlice('c', 2, 7.6, {}, 0.4)
+      ],
+      [
+        new TimelineThreadSlice('d', 3, 1.1, {}, 0.8),
+        new TimelineThreadSlice('e', 4, 7.1, {}, 0.3)
+      ]
+    ];
+    thread.updateBounds();
+    track.heading = 'thread regular';
+    track.headingWidth = '150px';
+    track.toolTip = thread.userFriendlyDetails + ':';
+    track.thread = thread;
+    track.viewport = new TimelineViewport(testEl);
+    track.viewport.setPanAndScale(0,
+        track.clientWidth / (1.1 * (thread.maxTimestamp - thread.minTimestamp));
+  }
+
+  function testTimelineThreadTrackWithRegularAndAsyncSlices() {
+    var testEl = getTestDiv('testTimelineThreadTrackWithAsyncSlices');
+    var track = TimelineThreadTrack();
+    testEl.appendChild(track);
+    var thread = new TimelineThread(new TimelineProcess(7), 1);
+    thread.subRows = [
+      [
+        new TimelineThreadSlice('a', 0, 1, {}, 1),
+        new TimelineThreadSlice('b', 1, 2.1, {}, 4.8),
+        new TimelineThreadSlice('b', 1, 7, {}, 0.5),
+        new TimelineThreadSlice('c', 2, 7.6, {}, 0.4)
+      ],
+      [
+        new TimelineThreadSlice('d', 3, 1.1, {}, 0.8),
+        new TimelineThreadSlice('e', 4, 7.1, {}, 0.3)
+      ]
+    ];
+    thread.asyncSlices.push(newAsyncSlice(1.2, 7.2 - 1.2, thread, thread));
+    thread.asyncSlices.push(newAsyncSlice(1.3, 7.3 - 1.3, thread, thread));
+    thread.updateBounds();
+    track.heading = 'thread regular + async';
+    track.headingWidth = '150px';
+    track.toolTip = thread.userFriendlyDetails + ':';
+    track.thread = thread;
+    track.viewport = new TimelineViewport(testEl);
+    track.viewport.setPanAndScale(0,
+        track.clientWidth /
+        (1.1 * (thread.maxTimestamp - thread.minTimestamp)));
   }
 
 </script>

chrome/browser/resources/tracing/trace_event_importer_test.html

@@ -23,7 +23,7 @@ found in the LICENSE file.
 
 function testCanImportEmpty() {
   self.assertFalse(tracing.TraceEventImporter.canImport([]));
-  self.assertFalse(tracing.TraceEventImporter.canImport(""));
+  self.assertFalse(tracing.TraceEventImporter.canImport(''));
 }
 
 function testBasicSingleThreadNonnestedParsing() {
@@ -559,6 +559,33 @@ function testImportStringWithMissingCloseSquareBracketAndNewline() {
   assertEquals(1, m.numProcesses);
 }
 
+function testStartFinishOneSliceOneThread() {
+  var events = [
+    // Time is intentionally out of order.
+    {name: 'a', args: {}, pid: 52, ts: 560, cat: 'foo', tid: 53,
+       ph: 'F', id: 72},
+    {name: 'a', args: {}, pid: 52, ts: 524, cat: 'foo', tid: 53,
+       ph: 'S', id: 72, args: {foo: 'bar'}}
+  ];
+
+  var m = new tracing.TimelineModel(events);
+  var t = m.processes[52].threads[53];
+  assertNotUndefined(t);
+  assertEquals(1, t.asyncSlices.slices.length);
+  assertEquals('a', t.asyncSlices.slices[0].title);
+  assertEquals(72, t.asyncSlices.slices[0].id);
+  assertEquals('bar', t.asyncSlices.slices[0].args.foo);
+  assertEquals(0, t.asyncSlices.slices[0].start);
+  assertAlmostEquals((60 - 24) / 1000, t.asyncSlices.slices[0].duration);
+  assertEquals(t, t.asyncSlices.slices[0].startThread);
+  assertEquals(t, t.asyncSlices.slices[0].endThread);
+}
+
+// TODO(nduca): one slice, two threads
+// TODO(nduca): one slice, two pids
+// TODO(nduca): one slice that doesnt end
+// TODO(nduca): one slice that is missing a start
+
 </script>
 </body>
 </html>