Move blink scheduler implementation into a component

content/renderer/gpu/compositor_dependencies.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_RENDERER_GPU_COMPOSITOR_DEPENDENCIES_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_DEPENDENCIES_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace cc {
 class BeginFrameSource;
 class ContextProvider;
 class SharedBitmapManager;
 class TaskGraphRunner;
 }
 
 namespace gpu {
 class GpuMemoryBufferManager;
 }
 
+namespace scheduler {
+class RendererScheduler;
+}
+
 namespace content {
-class RendererScheduler;
 
 class CompositorDependencies {
  public:
   virtual bool IsImplSidePaintingEnabled() = 0;
   virtual bool IsGpuRasterizationForced() = 0;
   virtual bool IsGpuRasterizationEnabled() = 0;
   virtual int GetGpuRasterizationMSAASampleCount() = 0;
   virtual bool IsLcdTextEnabled() = 0;
   virtual bool IsDistanceFieldTextEnabled() = 0;
   virtual bool IsZeroCopyEnabled() = 0;
   virtual bool IsOneCopyEnabled() = 0;
   virtual bool IsElasticOverscrollEnabled() = 0;
   // Only valid in single threaded mode.
   virtual bool UseSingleThreadScheduler() = 0;
   virtual uint32 GetImageTextureTarget() = 0;
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorMainThreadTaskRunner() = 0;
   // Returns null if the compositor is in single-threaded mode (ie. there is no
   // compositor thread).
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorImplThreadTaskRunner() = 0;
   virtual cc::SharedBitmapManager* GetSharedBitmapManager() = 0;
   virtual gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() = 0;
-  virtual RendererScheduler* GetRendererScheduler() = 0;
+  virtual scheduler::RendererScheduler* GetRendererScheduler() = 0;
   virtual cc::ContextProvider* GetSharedMainThreadContextProvider() = 0;
   virtual scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
       int routing_id) = 0;
   virtual cc::TaskGraphRunner* GetTaskGraphRunner() = 0;
   virtual bool IsGatherPixelRefsEnabled() = 0;
 
   virtual ~CompositorDependencies() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_DEPENDENCIES_H_