Adding performance benchmark for creating imagebitmap from imagedata

tools/perf/benchmarks/blink_perf.py

 # Copyright 2013 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.
 
 import os
 
 from core import perf_benchmark
 
 from telemetry import benchmark
 from telemetry.core import util
@@ skipping 68 matching lines @@
                            'blink_perf.js'), 'r') as f:
       self._blink_perf_js = f.read()
 
   def WillNavigateToPage(self, page, tab):
     page.script_to_evaluate_on_commit = self._blink_perf_js
 
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs([
         '--js-flags=--expose_gc',
         '--enable-experimental-web-platform-features',
-        '--disable-gesture-requirement-for-media-playback'
+        '--disable-gesture-requirement-for-media-playback',
+        '--enable-experimental-canvas-features'

[chrishtr, 2015/10/08 17:59:05]

This is for all perf tests? That's bad because we would no longer be testing
existing behavior. Why not enable the flag within your test like layout tests
do?

     ])
     if 'content-shell' in options.browser_type:
       options.AppendExtraBrowserArgs('--expose-internals-for-testing')
 
   def ValidateAndMeasurePage(self, page, tab, results):
     tab.WaitForJavaScriptExpression('testRunner.isDone', 600)
 
     log = tab.EvaluateJavaScript('document.getElementById("log").innerHTML')
 
     for line in log.splitlines():
@@ skipping 230 matching lines @@
   test = _BlinkPerfPywebsocketMeasurement
 
   @classmethod
   def Name(cls):
     return 'blink_perf.pywebsocket'
 
   def CreateStorySet(self, options):
     path = os.path.join(BLINK_PERF_BASE_DIR, 'Pywebsocket')
     return CreateStorySetFromPath(path, SKIPPED_FILE,
         shared_page_state_class=_SharedPywebsocketPageState)