Add switch to use ipc command buffer in Android WebView

content/public/browser/android/synchronous_compositor.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/service/in_process_command_buffer.h"
@@ skipping 32 matching lines @@
 
   static void SetGpuService(
       scoped_refptr<gpu::InProcessCommandBuffer::Service> service);
 
   // By default, synchronous compopsitor records the full layer, not only
   // what is inside and around the view port. This can be used to switch
   // between this record-full-layer behavior and normal record-around-viewport
   // behavior.
   static void SetRecordFullDocument(bool record_full_document);
 
+  // Turn on using ipc-based command buffer at run time. This should be removed
+  // once this feature is fully launched.
+  static void SetUseIpcCommandBuffer();
+
   // "On demand" hardware draw. The content is first clipped to |damage_area|,
   // then transformed through |transform|, and finally clipped to |view_size|.
   virtual scoped_ptr<cc::CompositorFrame> DemandDrawHw(
       gfx::Size surface_size,
       const gfx::Transform& transform,
       gfx::Rect viewport,
       gfx::Rect clip,
       gfx::Rect viewport_rect_for_tile_priority,
       const gfx::Transform& transform_for_tile_priority) = 0;
 
@@ skipping 18 matching lines @@
   // starts off as inactive and needs a SetActive(true) call to begin.
   virtual void SetIsActive(bool is_active) = 0;
 
  protected:
   virtual ~SynchronousCompositor() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_