Reland "DevTools: Support CPU profiles in OOPIFs"

This is a reland of 91d5ec53

Original change's description:
> DevTools: Support CPU profiles in OOPIFs
>
> BUG=832313,820250
>
> Change-Id: I53d730d4ff7e747eb0ccfe9a055738c1fe9858cf
> Reviewed-on: https://chromium-review.googlesource.com/1011350
> Commit-Queue: Alexei Filippov <alph@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#553688}

TBR=dgozman

Bug: 832313, 820250
Change-Id: I177e0d404b8efe595ddc680368b21c32160cd5de
Reviewed-on: https://chromium-review.googlesource.com/1065230
Commit-Queue: Alexei Filippov <alph@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560049}

third_party/WebKit/LayoutTests/http/tests/devtools/oopif/oopif-performance-cpu-profiles-expected.txt

+Test CPU profiles are recorded for OOPIFs.
+
+name: CrRendererMain
+url: http://127.0.0.1:8000/devtools/oopif/resources/page.html
+has CpuProfile: true
+
+name: CrRendererMain
+url: http://devtools.oopif.test:8000/devtools/oopif/resources/inner-iframe.html?second
+has CpuProfile: true
+
+

third_party/WebKit/LayoutTests/http/tests/devtools/oopif/oopif-performance-cpu-profiles.js

+// Copyright 2018 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.
+
+(async function() {
+  TestRunner.addResult(`Test CPU profiles are recorded for OOPIFs.\n`);
+
+  await TestRunner.loadModule('performance_test_runner');
+  await TestRunner.showPanel('timeline');
+
+  await PerformanceTestRunner.startTimeline();
+  await TestRunner.navigatePromise('resources/page.html');
+  await PerformanceTestRunner.stopTimeline();
+
+  for (const track of PerformanceTestRunner.timelineModel().tracks().sort((a, b) => a.url > b.url)) {
+    if (track.type !== TimelineModel.TimelineModel.TrackType.MainThread)
+      continue;
+    TestRunner.addResult(`name: ${track.name}`);
+    TestRunner.addResult(`url: ${track.url}`);
+    TestRunner.addResult(`has CpuProfile: ${track.thread.events().some(e => e.name === 'CpuProfile')}\n`);
+  }
+
+  TestRunner.completeTest();
+})();

third_party/blink/renderer/devtools/front_end/platform/utilities.js

@@ -1204,13 +1204,10 @@ Multimap.prototype = {
 
   /**
    * @param {K} key
-   * @return {!Set.<!V>}
+   * @return {!Set<!V>}
    */
   get: function(key) {
-    let result = this._map.get(key);
-    if (!result)
-      result = new Set();
-    return result;
+    return this._map.get(key) || new Set();
   },
 
   /**

third_party/blink/renderer/devtools/front_end/sdk/TracingModel.js

@@ -292,6 +292,14 @@ SDK.TracingModel = class {
     return this._processByName.get(name);
   }
 
+  /**
+   * @param {number} pid
+   * @return {?SDK.TracingModel.Process}
+   */
+  processById(pid) {
+    return this._processById.get(pid) || null;
+  }
+
   /**
    * @param {string} processName
    * @param {string} threadName

third_party/blink/renderer/devtools/front_end/timeline/TimelineController.js

@@ -26,6 +26,10 @@ Timeline.TimelineController = class {
     SDK.targetManager.observeModels(SDK.CPUProfilerModel, this);
   }
 
+  dispose() {
+    SDK.targetManager.unobserveModels(SDK.CPUProfilerModel, this);
+  }
+
   /**
    * @return {!SDK.Target}
    */
@@ -224,20 +228,74 @@ Timeline.TimelineController = class {
     this._tracingModel.addEvents([cpuProfileEvent]);
   }
 
+  /**
+   * @return {?Map<string, number>}
+   */
+  _buildTargetToProcessIdMap() {
+    const metadataEventTypes = TimelineModel.TimelineModel.DevToolsMetadataEvent;
+    const metadataEvents = this._tracingModel.devToolsMetadataEvents();
+    const browserMetaEvent = metadataEvents.find(e => e.name === metadataEventTypes.TracingStartedInBrowser);
+    if (!browserMetaEvent)
+      return null;
+
+    /** @type {!Multimap<string, string>} */
+    const pseudoPidToFrames = new Multimap();
+    /** @type {!Map<string, number>} */
+    const targetIdToPid = new Map();
+    const frames = browserMetaEvent.args.data['frames'];
+    for (const frameInfo of frames)
+      targetIdToPid.set(frameInfo.frame, frameInfo.processId);
+    for (const event of metadataEvents) {
+      const data = event.args.data;
+      switch (event.name) {
+        case metadataEventTypes.FrameCommittedInBrowser:
+          if (data.processId)
+            targetIdToPid.set(data.frame, data.processId);
+          else
+            pseudoPidToFrames.set(data.processPseudoId, data.frame);
+          break;
+        case metadataEventTypes.ProcessReadyInBrowser:
+          for (const frame of pseudoPidToFrames.get(data.processPseudoId) || [])
+            targetIdToPid.set(frame, data.processId);
+          break;
+      }
+    }
+    const mainFrame = frames.find(frame => !frame.parent);
+    const mainRendererProcessId = mainFrame.processId;
+    const mainProcess = this._tracingModel.processById(mainRendererProcessId);
+    if (mainProcess)
+      targetIdToPid.set(SDK.targetManager.mainTarget().id(), mainProcess.id());
+    return targetIdToPid;
+  }
+
   _injectCpuProfileEvents() {
     if (!this._cpuProfiles)
       return;
 
     const metadataEventTypes = TimelineModel.TimelineModel.DevToolsMetadataEvent;
     const metadataEvents = this._tracingModel.devToolsMetadataEvents();
-    const mainMetaEvent =
-        metadataEvents.filter(event => event.name === metadataEventTypes.TracingStartedInPage).peekLast();
-    if (!mainMetaEvent)
-      return;
 
-    const pid = mainMetaEvent.thread.process().id();
-    const mainCpuProfile = this._cpuProfiles.get(this._tracingManager.target().id());
-    this._injectCpuProfileEvent(pid, mainMetaEvent.thread.id(), mainCpuProfile);
+    const targetIdToPid = this._buildTargetToProcessIdMap();
+    if (targetIdToPid) {
+      for (const [id, profile] of this._cpuProfiles) {
+        const pid = targetIdToPid.get(id);
+        if (!pid)
+          continue;
+        const process = this._tracingModel.processById(pid);
+        const thread = process && process.threadByName(TimelineModel.TimelineModel.RendererMainThreadName);
+        if (thread)
+          this._injectCpuProfileEvent(pid, thread.id(), profile);
+      }
+    } else {
+      // Legacy backends support.
+      const mainMetaEvent =
+          metadataEvents.filter(event => event.name === metadataEventTypes.TracingStartedInPage).peekLast();
+      if (mainMetaEvent) {
+        const pid = mainMetaEvent.thread.process().id();
+        const mainCpuProfile = this._cpuProfiles.get(this._tracingManager.target().id());
+        this._injectCpuProfileEvent(pid, mainMetaEvent.thread.id(), mainCpuProfile);
+      }
+    }
 
     const workerMetaEvents =
         metadataEvents.filter(event => event.name === metadataEventTypes.TracingSessionIdForWorker);

third_party/blink/renderer/devtools/front_end/timeline/TimelinePanel.js

@@ -498,6 +498,7 @@ Timeline.TimelinePanel = class extends UI.Panel {
     this._setState(Timeline.TimelinePanel.State.StopPending);
     this._performanceModel = await this._controller.stopRecording();
     this._setUIControlsEnabled(true);
+    this._controller.dispose();
     this._controller = null;
   }