[DevTools] Unflake some inspector-protocol layout tests

BUG=402805,596968,734762

Change-Id: I05a0b54423a5e6acdd5052e734cfd01e3ed49822
Reviewed-on: https://chromium-review.googlesource.com/597013
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Reviewed-by: Andrey Lushnikov <lushnikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491169}

third_party/WebKit/LayoutTests/TestExpectations

@@ -742,11 +742,6 @@ crbug.com/498539 [ Win7 ] inspector/sources/debugger-pause/debugger-eval-on-call
 
 crbug.com/498539 [ Win7 ] inspector/elements/styles-4/styles-update-from-js.html [ Crash Pass ]
 
-crbug.com/596968 [ Win ] inspector-protocol/input/eventTimestamp.js [ Failure Pass ]
-
-crbug.com/734762 [ Linux ] inspector-protocol/stylesheet-tracking-restart.js [ Failure Pass ]
-crbug.com/734762 inspector-protocol/accessibility/accessibility-nameSources-input.js [ Failure Pass ]
-
 crbug.com/487281 [ Mac ] fast/forms/select/menulist-narrow-width.html [ Failure ]
 
 crbug.com/543110 [ Mac ] fast/text/international/text-shaping-arabic.html [ Failure ]
@@ -2820,7 +2815,6 @@ crbug.com/696407 [ Linux ] external/wpt/html/browsers/history/the-location-inter
 crbug.com/698520 external/wpt/preload/fetch-destination.https.html [ Failure Pass ]
 
 # Sheriff failures 2017-03-10
-crbug.com/402805 inspector-protocol/input/emulateTouchFromMouseEvent.js [ Timeout ]
 crbug.com/741210 [ Mac ] inspector-protocol/emulation/device-emulation-restore.js [ Failure ]
 crbug.com/700374 [ Win ] virtual/mojo-loading/http/tests/inspector/workers-on-navigation.html [ Failure Pass ]
 crbug.com/700374 [ Win ] http/tests/inspector/workers-on-navigation.html [ Failure Pass ]

third_party/WebKit/LayoutTests/inspector-protocol/input/eventTimestamp-expected.txt

@@ -7,14 +7,8 @@ type: keydown
 type: mousedown
 -----Event-----
 type: mousedown
------Event-----
-type: touchstart
------Event-----
-type: touchstart
 -----Verify-----
-Received 6 timestamps
-timeStamps offsets is as expected.
-timeStamps offsets is as expected.
+Received 4 timestamps
 timeStamps offsets is as expected.
 timeStamps offsets is as expected.
 timeStamps offsets is as expected.

third_party/WebKit/LayoutTests/inspector-protocol/input/eventTimestamp.js

@@ -48,7 +48,7 @@
 
   // We send epoch timestamp but expect to receive high-res timestamps
   var baseEpochTimestamp = Date.now() / 1000; // in seconds
-  var offsets = [0, 5, 10, 15, 20, 25];
+  var offsets = [0, 5, 10, 15];
   var sentTimestamps = offsets.map(offset => baseEpochTimestamp + offset);
 
   var offsetsMs = offsets.map(offset => 1000 * offset);
@@ -85,24 +85,6 @@
     x: 100,
     y: 200
   }));
-  dumpError(await dp.Input.dispatchTouchEvent({
-    type: 'touchStart',
-    timestamp: sentTimestamps[4],
-    touchPoints: [{
-      state: 'touchPressed',
-      x: 100,
-      y: 200
-    }]
-  }));
-  dumpError(await dp.Input.dispatchTouchEvent({
-    type: 'touchStart',
-    timestamp: sentTimestamps[5],
-    touchPoints: [{
-      state: 'touchPressed',
-      x: 100,
-      y: 100
-    }]
-  }));
 
   testRunner.log(await session.evaluateAsync('verifyTimestampsPromise'));
   testRunner.completeTest();