Adds BeginFrameControl via DevTools.

content/browser/compositor/gpu_process_transport_factory.h

 // Copyright 2014 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_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 49 matching lines @@
   void SetDisplayVisible(ui::Compositor* compositor, bool visible) override;
   void ResizeDisplay(ui::Compositor* compositor,
                      const gfx::Size& size) override;
   void SetDisplayColorSpace(ui::Compositor* compositor,
                             const gfx::ColorSpace& color_space) override;
   void SetAuthoritativeVSyncInterval(ui::Compositor* compositor,
                                      base::TimeDelta interval) override;
   void SetDisplayVSyncParameters(ui::Compositor* compositor,
                                  base::TimeTicks timebase,
                                  base::TimeDelta interval) override;
+  void SwapBeginFrameSource(
+        ui::Compositor* compositor,
+        std::unique_ptr<cc::BeginFrameSource>* begin_frame_source) override;
   void SetOutputIsSecure(ui::Compositor* compositor, bool secure) override;
   void AddObserver(ui::ContextFactoryObserver* observer) override;
   void RemoveObserver(ui::ContextFactoryObserver* observer) override;
 
   // ImageTransportFactory implementation.
   ui::ContextFactory* GetContextFactory() override;
   cc::SurfaceManager* GetSurfaceManager() override;
   display_compositor::GLHelper* GetGLHelper() override;
   void SetGpuChannelEstablishFactory(
       gpu::GpuChannelEstablishFactory* factory) override;
@@ skipping 46 matching lines @@
   gpu::GpuChannelEstablishFactory* gpu_channel_factory_ = nullptr;
 
   base::WeakPtrFactory<GpuProcessTransportFactory> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessTransportFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_