Adaptively throttle texture uploads

tools/gpu/gpu_tools/texture_upload_benchmark.py

 # 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.
 import os
 
 import chrome_remote_control
 
 import multi_page_benchmark
 import scrolling_benchmark
 
 
 class TextureUploadBenchmark(scrolling_benchmark.ScrollingBenchmark):
   def MeasurePage(self, page, tab):
     rendering_stats = self.ScrollPageFully(tab)
+
+    if rendering_stats["totalCommitCount"] == 0 :
+      averageCommitTimeMs = 0
+    else :
+      averageCommitTimeMs = (1000 * rendering_stats["totalCommitTimeInSeconds"]
+                             / rendering_stats["totalCommitCount"])
+
     return {
-      "texture_upload_count": rendering_stats["textureUploadCount"]
+      "texture_upload_count": rendering_stats["textureUploadCount"],
+      "average_commit_time_ms": averageCommitTimeMs
     }
 
 def Main():
   return multi_page_benchmark.Main(TextureUploadBenchmark())