Refactoring the way begin frame sources inside scheduler work.

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 13 matching lines @@
 #include "cc/input/top_controls_manager_client.h"
 #include "cc/layers/layer_lists.h"
 #include "cc/layers/render_pass_sink.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/renderer.h"
 #include "cc/quads/render_pass.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/tile_manager.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "cc/scheduler/draw_result.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class CompletionEvent;
 class CompositorFrameMetadata;
 class DebugRectHistory;
@@ skipping 22 matching lines @@
 class LayerTreeHostImplClient {
  public:
   virtual void UpdateRendererCapabilitiesOnImplThread() = 0;
   virtual void DidLoseOutputSurfaceOnImplThread() = 0;
   virtual void CommitVSyncParameters(base::TimeTicks timebase,
                                      base::TimeDelta interval) = 0;
   virtual void SetEstimatedParentDrawTime(base::TimeDelta draw_time) = 0;
   virtual void SetMaxSwapsPendingOnImplThread(int max) = 0;
   virtual void DidSwapBuffersOnImplThread() = 0;
   virtual void DidSwapBuffersCompleteOnImplThread() = 0;
-  virtual void BeginFrame(const BeginFrameArgs& args) = 0;
   virtual void OnCanDrawStateChanged(bool can_draw) = 0;
   virtual void NotifyReadyToActivate() = 0;
   // Please call these 3 functions through
   // LayerTreeHostImpl's SetNeedsRedraw(), SetNeedsRedrawRect() and
   // SetNeedsAnimate().
   virtual void SetNeedsRedrawOnImplThread() = 0;
   virtual void SetNeedsRedrawRectOnImplThread(const gfx::Rect& damage_rect) = 0;
   virtual void SetNeedsAnimateOnImplThread() = 0;
   virtual void DidInitializeVisibleTileOnImplThread() = 0;
   virtual void SetNeedsCommitOnImplThread() = 0;
@@ skipping 18 matching lines @@
 
 // LayerTreeHostImpl owns the LayerImpl trees as well as associated rendering
 // state.
 class CC_EXPORT LayerTreeHostImpl
     : public InputHandler,
       public RendererClient,
       public TileManagerClient,
       public OutputSurfaceClient,
       public TopControlsManagerClient,
       public ScrollbarAnimationControllerClient,
+      public BeginFrameSource,
       public base::SupportsWeakPtr<LayerTreeHostImpl> {
  public:
   static scoped_ptr<LayerTreeHostImpl> Create(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       SharedBitmapManager* manager,
       int id);
   virtual ~LayerTreeHostImpl();
 
+  // BeginFrameSource implementation
+  virtual bool NeedsBeginFrames() const OVERRIDE;
+  virtual void SetNeedsBeginFrames(bool needs_begin_frames) OVERRIDE;
+  virtual void DidFinishFrame(size_t remaining_frames) OVERRIDE{};
+
   // InputHandler implementation
   virtual void BindToClient(InputHandlerClient* client) OVERRIDE;
   virtual InputHandler::ScrollStatus ScrollBegin(
       const gfx::Point& viewport_point,
       InputHandler::ScrollInputType type) OVERRIDE;
   virtual InputHandler::ScrollStatus ScrollAnimated(
       const gfx::Point& viewport_point,
       const gfx::Vector2dF& scroll_delta) OVERRIDE;
   virtual bool ScrollBy(const gfx::Point& viewport_point,
                         const gfx::Vector2dF& scroll_delta) OVERRIDE;
@@ skipping 153 matching lines @@
   void SetUseGpuRasterization(bool use_gpu);
   bool use_gpu_rasterization() const { return use_gpu_rasterization_; }
   bool create_low_res_tiling() const {
     return settings_.create_low_res_tiling && !use_gpu_rasterization_;
   }
   ResourcePool* resource_pool() { return resource_pool_.get(); }
   Renderer* renderer() { return renderer_.get(); }
   const RendererCapabilitiesImpl& GetRendererCapabilities() const;
 
   virtual bool SwapBuffers(const FrameData& frame);
-  void SetNeedsBeginFrame(bool enable);
   virtual void WillBeginImplFrame(const BeginFrameArgs& args);
   void DidModifyTilePriorities();
 
   LayerTreeImpl* active_tree() { return active_tree_.get(); }
   const LayerTreeImpl* active_tree() const { return active_tree_.get(); }
   LayerTreeImpl* pending_tree() { return pending_tree_.get(); }
   const LayerTreeImpl* pending_tree() const { return pending_tree_.get(); }
   LayerTreeImpl* recycle_tree() { return recycle_tree_.get(); }
   const LayerTreeImpl* recycle_tree() const { return recycle_tree_.get(); }
   // Returns the tree LTH synchronizes with.
@@ skipping 111 matching lines @@
 
   void UpdateCurrentBeginFrameArgs(const BeginFrameArgs& args);
   void ResetCurrentBeginFrameArgsForNextFrame();
   virtual BeginFrameArgs CurrentBeginFrameArgs() const;
 
   // Expected time between two begin impl frame calls.
   base::TimeDelta begin_impl_frame_interval() const {
     return begin_impl_frame_interval_;
   }
 
-  void AsValueInto(base::debug::TracedValue* value) const {
-    return AsValueWithFrameInto(NULL, value);
-  }
+  virtual void AsValueInto(base::debug::TracedValue* value) const OVERRIDE;
   void AsValueWithFrameInto(FrameData* frame,
                             base::debug::TracedValue* value) const;
   scoped_refptr<base::debug::ConvertableToTraceFormat> AsValue() const;
   scoped_refptr<base::debug::ConvertableToTraceFormat> AsValueWithFrame(
       FrameData* frame) const;
   scoped_refptr<base::debug::ConvertableToTraceFormat> ActivationStateAsValue()
       const;
   void ActivationStateAsValueInto(base::debug::TracedValue* value) const;
 
   bool page_scale_animation_active() const { return !!page_scale_animation_; }
@@ skipping 59 matching lines @@
 
   const AnimationRegistrar::AnimationControllerMap&
       active_animation_controllers() const {
     return animation_registrar_->active_animation_controllers();
   }
 
   bool manage_tiles_needed() const { return tile_priorities_dirty_; }
 
   LayerTreeHostImplClient* client_;
   Proxy* proxy_;
+  bool needs_begin_frames_;
 
  private:
   void CreateAndSetRenderer();
   void CreateAndSetTileManager();
   void DestroyTileManager();
   void ReleaseTreeResources();
   void EnforceZeroBudget(bool zero_budget);
 
   bool UsePendingTreeForSync() const;
   bool UseZeroCopyRasterizer() const;
@@ skipping 177 matching lines @@
 
   std::vector<PictureLayerImpl*> picture_layers_;
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_