Revert of Make SingleThreadProxy a SchedulerClient

ui/compositor/compositor.h

 // Copyright (c) 2012 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 UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_single_thread_client.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/compositor/compositor_export.h"
 #include "ui/compositor/compositor_observer.h"
 #include "ui/compositor/layer_animator_collection.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/vector2d.h"
 
+class SkBitmap;
+
 namespace base {
 class MessageLoopProxy;
 class RunLoop;
 }
 
 namespace cc {
 class ContextProvider;
 class Layer;
 class LayerTreeDebugState;
 class LayerTreeHost;
@@ skipping 113 matching lines @@
 
   // Called when we need the compositor to preserve the alpha channel in the
   // output for situations when we want to render transparently atop something
   // else, e.g. Aero glass.
   void SetHostHasTransparentBackground(bool host_has_transparent_background);
 
   // The scale factor of the device that this compositor is
   // compositing layers on.
   float device_scale_factor() const { return device_scale_factor_; }
 
+  // Draws the scene created by the layer tree and any visual effects.
+  void Draw();
+
   // Where possible, draws are scissored to a damage region calculated from
   // changes to layer properties.  This bypasses that and indicates that
   // the whole frame needs to be drawn.
   void ScheduleFullRedraw();
 
   // Schedule redraw and append damage_rect to the damage region calculated
   // from changes to layer properties.
   void ScheduleRedrawRect(const gfx::Rect& damage_rect);
 
   // Finishes all outstanding rendering on the GPU.
@@ skipping 48 matching lines @@
                                    float page_scale) OVERRIDE {}
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface(bool fallback)
       OVERRIDE;
   virtual void DidInitializeOutputSurface() OVERRIDE {}
   virtual void WillCommit() OVERRIDE {}
   virtual void DidCommit() OVERRIDE;
   virtual void DidCommitAndDrawFrame() OVERRIDE;
   virtual void DidCompleteSwapBuffers() OVERRIDE;
 
   // cc::LayerTreeHostSingleThreadClient implementation.
+  virtual void ScheduleComposite() OVERRIDE;
+  virtual void ScheduleAnimation() OVERRIDE;
   virtual void DidPostSwapBuffers() OVERRIDE;
   virtual void DidAbortSwapBuffers() OVERRIDE;
 
   // LayerAnimatorCollectionDelegate implementation.
   virtual void ScheduleAnimationForLayerCollection() OVERRIDE;
 
+  int last_started_frame() { return last_started_frame_; }
+  int last_ended_frame() { return last_ended_frame_; }
+
   bool IsLocked() { return compositor_lock_ != NULL; }
 
   const cc::LayerTreeDebugState& GetLayerTreeDebugState() const;
   void SetLayerTreeDebugState(const cc::LayerTreeDebugState& debug_state);
 
   LayerAnimatorCollection* layer_animator_collection() {
     return &layer_animator_collection_;
   }
 
  private:
   friend class base::RefCounted<Compositor>;
   friend class CompositorLock;
 
   // Called by CompositorLock.
   void UnlockCompositor();
 
   // Called to release any pending CompositorLock
   void CancelCompositorLock();
 
+  // Notifies the compositor that compositing is complete.
+  void NotifyEnd();
+
   gfx::Size size_;
 
   ui::ContextFactory* context_factory_;
 
   // The root of the Layer tree drawn by this compositor.
   Layer* root_layer_;
 
   ObserverList<CompositorObserver> observer_list_;
 
   gfx::AcceleratedWidget widget_;
   scoped_refptr<cc::Layer> root_web_layer_;
   scoped_ptr<cc::LayerTreeHost> host_;
   scoped_refptr<base::MessageLoopProxy> compositor_thread_loop_;
 
   // The manager of vsync parameters for this compositor.
   scoped_refptr<CompositorVSyncManager> vsync_manager_;
 
   // The device scale factor of the monitor that this compositor is compositing
   // layers on.
   float device_scale_factor_;
 
   int last_started_frame_;
   int last_ended_frame_;
 
   bool disable_schedule_composite_;
 
   CompositorLock* compositor_lock_;
 
+  // Prevent more than one draw from being scheduled.
+  bool defer_draw_scheduling_;
+
+  // Used to prevent Draw()s while a composite is in progress.
+  bool waiting_on_compositing_end_;
+  bool draw_on_compositing_end_;
+  enum SwapState { SWAP_NONE, SWAP_POSTED, SWAP_COMPLETED };
+  SwapState swap_state_;
+
   LayerAnimatorCollection layer_animator_collection_;
 
+  base::WeakPtrFactory<Compositor> schedule_draw_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_