Pass a ui::PaintContext from ui::Layer to layer delegates.

ui/compositor/layer.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_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 344 matching lines @@
       scoped_ptr<cc::SingleReleaseCallback>* release_callback,
       bool use_shared_memory) override;
 
   float device_scale_factor() const { return device_scale_factor_; }
 
   // Forces a render surface to be used on this layer. This has no positive
   // impact, and is only used for benchmarking/testing purpose.
   void SetForceRenderSurface(bool force);
   bool force_render_surface() const { return force_render_surface_; }
 
-  // TODO(danakj): Plumb this to the LayerDelegate::OnPaintLayer instead of
-  // providing it here. For more win, use the full damage region instead of a
-  // bounding rect.
-  gfx::Rect PaintRect() const;
-
   // LayerClient
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> TakeDebugInfo()
       override;
 
   // LayerAnimationEventObserver
   void OnAnimationStarted(const cc::AnimationEvent& event) override;
 
   // Whether this layer has animations waiting to get sent to its cc::Layer.
   bool HasPendingThreadedAnimations() {
     return pending_threaded_animations_.size() != 0;
@@ skipping 147 matching lines @@
   cc::TextureMailbox mailbox_;
 
   // The callback to release the mailbox. This is only set after
   // SetTextureMailbox is called, before we give it to the TextureLayer.
   scoped_ptr<cc::SingleReleaseCallback> mailbox_release_callback_;
 
   // The size of the frame or texture in DIP, set when SetShowDelegatedContent
   // or SetTextureMailbox was called.
   gfx::Size frame_size_in_dip_;
 
-  bool inside_paint_;
-  gfx::Rect paint_rect_;
-
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_