Define a --force-gpu-rasterization flag

tools/perf/benchmarks/smoothness.py

 # Copyright (c) 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.
 
 from benchmarks import silk_flags
 from measurements import smoothness
 from telemetry import test
 
 
 class SmoothnessTop25(test.Test):
@@ skipping 45 matching lines @@
 class SmoothnessGpuRasterizationTop25(test.Test):
   """Measures rendering statistics for the top 25 with GPU rasterization
   """
   tag = 'gpu_rasterization'
   test = smoothness.Smoothness
   page_set = 'page_sets/top_25.json'
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs('--enable-threaded-compositing')
     options.AppendExtraBrowserArgs('--force-compositing-mode')
     options.AppendExtraBrowserArgs('--enable-impl-side-painting')
-    options.AppendExtraBrowserArgs('--enable-gpu-rasterization')
+    options.AppendExtraBrowserArgs('--force-gpu-rasterization')
 
 
 class SmoothnessGpuRasterizationKeyMobileSites(test.Test):
   """Measures rendering statistics for the key mobile sites with GPU
   rasterization
   """
   tag = 'gpu_rasterization'
   test = smoothness.Smoothness
   page_set = 'page_sets/key_mobile_sites.json'
   def CustomizeBrowserOptions(self, options):
@@ skipping 30 matching lines @@
     silk_flags.CustomizeBrowserOptionsForFastPath(options)
 
 
 @test.Enabled('android')
 class SmoothnessToughPinchZoomCases(test.Test):
   """Measures rendering statistics for pinch-zooming into the tough pinch zoom
   cases
   """
   test = smoothness.Smoothness
   page_set = 'page_sets/tough_pinch_zoom_cases.json'