cc: Control activation from the Scheduler

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 <string>
 #include <vector>
@@ skipping 43 matching lines @@
 // LayerTreeHost->Proxy callback interface.
 class LayerTreeHostImplClient {
  public:
   virtual void DidTryInitializeRendererOnImplThread(
       bool success,
       scoped_refptr<ContextProvider> offscreen_context_provider) = 0;
   virtual void DidLoseOutputSurfaceOnImplThread() = 0;
   virtual void OnSwapBuffersCompleteOnImplThread() = 0;
   virtual void BeginFrameOnImplThread(const BeginFrameArgs& args) = 0;
   virtual void OnCanDrawStateChanged(bool can_draw) = 0;
-  virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) = 0;
+  virtual void NotifyReadyToActivate() = 0;
   virtual void SetNeedsRedrawOnImplThread() = 0;
   virtual void SetNeedsRedrawRectOnImplThread(gfx::Rect damage_rect) = 0;
   virtual void DidInitializeVisibleTileOnImplThread() = 0;
   virtual void SetNeedsCommitOnImplThread() = 0;
   virtual void PostAnimationEventsToMainThreadOnImplThread(
       scoped_ptr<AnimationEventsVector> events,
       base::Time wall_clock_time) = 0;
   // Returns true if resources were deleted by this call.
   virtual bool ReduceContentsTextureMemoryOnImplThread(
       size_t limit_bytes,
@@ skipping 165 matching lines @@
 
   void Readback(void* pixels, gfx::Rect rect_in_device_viewport);
 
   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(); }
   const LayerTreeImpl* recycle_tree() const { return recycle_tree_.get(); }
   virtual void CreatePendingTree();
   void UpdateVisibleTiles();
-  virtual void ActivatePendingTreeIfNeeded();
+  virtual void ActivatePendingTree();
 
   // Shortcuts to layers on the active tree.
   LayerImpl* RootLayer() const;
   LayerImpl* RootScrollLayer() const;
   LayerImpl* CurrentlyScrollingLayer() const;
 
   virtual void SetVisible(bool visible);
   bool visible() const { return visible_; }
 
   void SetNeedsCommit() { client_->SetNeedsCommitOnImplThread(); }
@@ skipping 123 matching lines @@
   void DeleteUIResource(UIResourceId uid);
 
   ResourceProvider::ResourceId ResourceIdForUIResource(UIResourceId uid) const;
 
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation);
-  virtual void ActivatePendingTree();
 
   // Virtual for testing.
   virtual void AnimateLayers(base::TimeTicks monotonic_time,
                              base::Time wall_clock_time);
 
   // Virtual for testing.
   virtual base::TimeDelta LowFrequencyAnimationInterval() const;
 
   const AnimationRegistrar::AnimationControllerMap&
       active_animation_controllers() const {
@@ skipping 59 matching lines @@
   // |resource_provider_| and |tile_manager_| can be NULL, e.g. when using tile-
   // free rendering - see OutputSurface::ForcedDrawToSoftwareDevice().
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<TileManager> tile_manager_;
   scoped_ptr<Renderer> renderer_;
 
   // Tree currently being drawn.
   scoped_ptr<LayerTreeImpl> active_tree_;
 
   // In impl-side painting mode, tree with possibly incomplete rasterized
-  // content. May be promoted to active by ActivatePendingTreeIfNeeded().
+  // content. May be promoted to active by ActivatePendingTree().
   scoped_ptr<LayerTreeImpl> pending_tree_;
 
   // In impl-side painting mode, inert tree with layers that can be recycled
   // by the next sync from the main thread.
   scoped_ptr<LayerTreeImpl> recycle_tree_;
 
   InputHandlerClient* input_handler_client_;
   bool did_lock_scrolling_layer_;
   bool should_bubble_scrolls_;
   bool wheel_scrolling_;
@@ skipping 72 matching lines @@
 
   // Optional callback to notify of new tree activations.
   base::Closure tree_activation_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_