Add DisplayScheduler to enable BeginFrame-based scheduling of surfaces.

cc/surfaces/display.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 CC_SURFACES_DISPLAY_H_
 #define CC_SURFACES_DISPLAY_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/renderer.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/surfaces/surface_aggregator.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/surfaces/surfaces_export.h"
 
 namespace gfx {
 class Size;
 }
 
 namespace cc {
 
 class BlockingTaskRunner;
 class DirectRenderer;
 class DisplayClient;
+class DisplayScheduler;
 class OutputSurface;
 class RendererSettings;
 class ResourceProvider;
 class SharedBitmapManager;
 class Surface;
 class SurfaceAggregator;
 class SurfaceIdAllocator;
 class SurfaceFactory;
 class TextureMailboxDeleter;
 
 // A Display produces a surface that can be used to draw to a physical display
 // (OutputSurface). The client is responsible for creating and sizing the
 // surface IDs used to draw into the display and deciding when to draw.
 class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
                                    public RendererClient,
                                    public SurfaceDamageObserver {
  public:
   Display(DisplayClient* client,
           SurfaceManager* manager,
           SharedBitmapManager* bitmap_manager,
           gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
           const RendererSettings& settings);
   ~Display() override;
 
-  bool Initialize(scoped_ptr<OutputSurface> output_surface);
+  bool Initialize(scoped_ptr<OutputSurface> output_surface,
+                  DisplayScheduler* scheduler);
 
   // device_scale_factor is used to communicate to the external window system
   // what scale this was rendered at.
   void SetSurfaceId(SurfaceId id, float device_scale_factor);
   void Resize(const gfx::Size& new_size);
   bool Draw();
 
   SurfaceId CurrentSurfaceId();
   int GetMaxFramesPending();
 
@@ skipping 28 matching lines @@
 
   DisplayClient* client_;
   SurfaceManager* manager_;
   SharedBitmapManager* bitmap_manager_;
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
   RendererSettings settings_;
   SurfaceId current_surface_id_;
   gfx::Size current_surface_size_;
   float device_scale_factor_;
   scoped_ptr<OutputSurface> output_surface_;
+  DisplayScheduler* scheduler_;
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<SurfaceAggregator> aggregator_;
   scoped_ptr<DirectRenderer> renderer_;
   scoped_ptr<BlockingTaskRunner> blocking_main_thread_task_runner_;
   scoped_ptr<TextureMailboxDeleter> texture_mailbox_deleter_;
   std::vector<ui::LatencyInfo> stored_latency_info_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_DISPLAY_H_