Adding a field trial for testing --force-compositing-mode on 50% of

chrome/browser/gpu_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_GPU_UTIL_H_
 #define CHROME_BROWSER_GPU_UTIL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 51 matching lines @@
 //
 // Caller is responsible for deleting the returned value.
 base::Value* GetFeatureStatus();
 
 // Returns the GpuInfo as a DictionaryValue.
 base::DictionaryValue* GpuInfoAsDictionaryValue();
 
 // Send UMA histograms about the enabled features.
 void UpdateStats();
 
+// Returs whether this client has been selected for the force-compositing-mode
+// trial.
+bool InForceCompositingModeTrial();
+
+// Sets up the force-compositing-mode field trial.
+void InitializeForceCompositingModeFieldTrial();
+
 }  // namespace gpu_util
 
 #endif  // CHROME_BROWSER_GPU_UTIL_H_