cc: Add message passing mechanism to micro benchmarking.

tools/perf/measurements/rasterize_and_record_micro.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 sys
 import time
 
 from telemetry.core.util import TimeoutException
 from telemetry.page import page_measurement
 from telemetry.page import page_test
@@ skipping 50 matching lines @@
     except TimeoutException:
       pass
     time.sleep(self.options.start_wait_time)
 
     record_repeat = self.options.record_repeat
     rasterize_repeat = self.options.rasterize_repeat
     # Enqueue benchmark
     tab.ExecuteJavaScript("""
         window.benchmark_results = {};
         window.benchmark_results.done = false;
-        window.benchmark_results.scheduled =
+        window.benchmark_results.id =
             chrome.gpuBenchmarking.runMicroBenchmark(
                 "rasterize_and_record_benchmark",
                 function(value) {
                   window.benchmark_results.done = true;
                   window.benchmark_results.results = value;
                 }, {
                   "record_repeat_count": """ + str(record_repeat) + """,
                   "rasterize_repeat_count": """ + str(rasterize_repeat) + """
                 });
     """)
 
-    scheduled = tab.EvaluateJavaScript('window.benchmark_results.scheduled')
-    if (not scheduled):
+    benchmark_id = tab.EvaluateJavaScript('window.benchmark_results.id')
+    if (not benchmark_id):
       raise page_measurement.MeasurementFailure(
           'Failed to schedule rasterize_and_record_micro')
 
     tab.WaitForJavaScriptExpression(
         'window.benchmark_results.done', self.options.timeout)
 
     data = tab.EvaluateJavaScript('window.benchmark_results.results')
 
     pixels_recorded = data['pixels_recorded']
     record_time = data['record_time_ms']
@@ skipping 33 matching lines @@
       results.Add('pixels_rasterized_with_non_solid_color', 'pixels',
           pixels_rasterized_with_non_solid_color)
       results.Add('pixels_rasterized_as_opaque', 'pixels',
           pixels_rasterized_as_opaque)
       results.Add('total_layers', 'count', total_layers)
       results.Add('total_picture_layers', 'count', total_picture_layers)
       results.Add('total_picture_layers_with_no_content', 'count',
           total_picture_layers_with_no_content)
       results.Add('total_picture_layers_off_screen', 'count',
           total_picture_layers_off_screen)