Make field trials activated in the GPU process be reflected in browser.

content/browser/gpu/gpu_process_host.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 CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_
 #define CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 183 matching lines @@
   void OnGpuMemoryBufferCreated(const gfx::GpuMemoryBufferHandle& handle);
 #if defined(OS_ANDROID)
   void OnDestroyingVideoSurfaceAck(int surface_id);
 #endif
   void OnDidCreateOffscreenContext(const GURL& url);
   void OnDidLoseContext(bool offscreen,
                         gpu::error::ContextLostReason reason,
                         const GURL& url);
   void OnDidDestroyOffscreenContext(const GURL& url);
   void OnGpuMemoryUmaStatsReceived(const gpu::GPUMemoryUmaStats& stats);
+  void OnFieldTrialActivated(const std::string& trial_name);
 
 #if defined(OS_WIN)
   void OnAcceleratedSurfaceCreatedChildWindow(
       gpu::SurfaceHandle parent_handle,
       gpu::SurfaceHandle window_handle);
 #endif
 
   void CreateChannelCache(int32_t client_id);
   void OnDestroyChannel(int32_t client_id);
   void OnCacheShader(int32_t client_id,
@@ skipping 87 matching lines @@
   // Browser-side Mojo endpoint which sets up a Mojo channel with the child
   // process and contains the browser's ServiceRegistry.
   std::unique_ptr<MojoApplicationHost> mojo_application_host_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_