ui: Clean up damaged rects and clear them after painting.

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>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/animation/animation_events.h"
 #include "cc/animation/layer_animation_event_observer.h"
+#include "cc/base/region.h"
 #include "cc/base/scoped_ptr_vector.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer_client.h"
 #include "cc/layers/surface_layer.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/resources/texture_mailbox.h"
 #include "cc/surfaces/surface_id.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/compositor/compositor.h"
@@ skipping 285 matching lines @@
   bool SchedulePaint(const gfx::Rect& invalid_rect);
 
   // Schedules a redraw of the layer tree at the compositor.
   // Note that this _does not_ invalidate any region of this layer; use
   // SchedulePaint() for that.
   void ScheduleDraw();
 
   // Uses damaged rectangles recorded in |damaged_region_| to invalidate the
   // |cc_layer_|.
   void SendDamagedRects();
+  void ClearDamagedRects();
 
-  const SkRegion& damaged_region() const { return damaged_region_; }
+  const cc::Region& damaged_region() const { return damaged_region_; }
 
   void CompleteAllAnimations();
 
   // Suppresses painting the content by disconnecting |delegate_|.
   void SuppressPaint();
 
   // Notifies the layer that the device scale factor has changed.
   void OnDeviceScaleFactorChanged(float device_scale_factor);
 
   // Notifies the layer that one of its children has received a new
@@ skipping 118 matching lines @@
   gfx::Vector2dF subpixel_position_offset_;
 
   // Visibility of this layer. See SetVisible/IsDrawn for more details.
   bool visible_;
 
   bool force_render_surface_;
 
   bool fills_bounds_opaquely_;
   bool fills_bounds_completely_;
 
-  // Union of damaged rects, in pixel coordinates, to be used when
-  // compositor is ready to paint the content.
-  SkRegion damaged_region_;
+  // Union of damaged rects, in layer space, to be used when compositor is ready
+  // to paint the content.
+  cc::Region damaged_region_;
 
   int background_blur_radius_;
 
   // Several variables which will change the visible representation of
   // the layer.
   float layer_saturation_;
   float layer_brightness_;
   float layer_grayscale_;
   bool layer_inverted_;
 
@@ skipping 54 matching lines @@
   // The size of the frame or texture in DIP, set when SetShowDelegatedContent
   // or SetTextureMailbox was called.
   gfx::Size frame_size_in_dip_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_