cc: Add strict layer property change checking and handle bounds changes during paint.

cc/layers/layer.h

 // Copyright 2010 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_LAYERS_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/layer_animation_value_observer.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/region.h"
 #include "cc/layers/draw_properties.h"
 #include "cc/layers/layer_lists.h"
 #include "cc/layers/layer_position_constraint.h"
+#include "cc/layers/paint_properties.h"
 #include "cc/layers/render_surface.h"
 #include "cc/trees/occlusion_tracker.h"
 #include "skia/ext/refptr.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/transform.h"
 
@@ skipping 231 matching lines @@
   const Layer* replica_layer() const { return replica_layer_.get(); }
 
   bool has_mask() const { return !!mask_layer_; }
   bool has_replica() const { return !!replica_layer_; }
   bool replica_has_mask() const {
     return replica_layer_ && (mask_layer_ || replica_layer_->mask_layer_);
   }
 
   // These methods typically need to be overwritten by derived classes.
   virtual bool DrawsContent() const;
+  virtual void SavePaintProperties();
   virtual void Update(ResourceUpdateQueue* queue,
                       const OcclusionTracker* occlusion,
                       RenderingStats* stats) {}
   virtual bool NeedMoreUpdates();
   virtual void SetIsMask(bool is_mask) {}
 
   void SetDebugName(const std::string& debug_name);
 
   virtual void PushPropertiesTo(LayerImpl* layer);
 
@@ skipping 82 matching lines @@
   virtual bool CanClipSelf() const;
 
   // Constructs a LayerImpl of the correct runtime type for this Layer type.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl);
 
   bool NeedsDisplayForTesting() const { return needs_display_; }
   void ResetNeedsDisplayForTesting() { needs_display_ = false; }
 
   RenderingStatsInstrumentation* rendering_stats_instrumentation() const;
 
+  const PaintProperties& paint_properties() const {
+    return paint_properties_;
+  }
+
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
   virtual ~Layer();
 
   Layer();
 
   void SetNeedsCommit();
   void SetNeedsFullTreeSync();
+  bool IsPropertyChangeAllowed() const;
 
   // This flag is set when layer need repainting/updating.
   bool needs_display_;
 
   // Tracks whether this layer may have changed stacking order with its
   // siblings.
   bool stacking_order_changed_;
 
   // The update rect is the region of the compositor resource that was
   // actually updated by the compositor. For layers that may do updating
@@ skipping 78 matching lines @@
   float raster_scale_;
   bool automatically_compute_raster_scale_;
   bool bounds_contain_page_scale_;
 
   gfx::Transform impl_transform_;
 
   WebKit::WebLayerScrollClient* layer_scroll_client_;
 
   DrawProperties<Layer, RenderSurface> draw_properties_;
 
+  PaintProperties paint_properties_;
+
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_