HUD: Show first paint invalidation in red

cc/layers/picture_layer.h

 // Copyright 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 CC_LAYERS_PICTURE_LAYER_H_
 #define CC_LAYERS_PICTURE_LAYER_H_
 
+#include <vector>
+
 #include "cc/base/invalidation_region.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/micro_benchmark_controller.h"
 #include "cc/layers/layer.h"
 #include "cc/resources/picture_pile.h"
 #include "cc/trees/occlusion_tracker.h"
 
 namespace cc {
 
 class ContentLayerClient;
+class DebugRectHistory;
 class ResourceUpdateQueue;
+struct DebugRect;
 
 class CC_EXPORT PictureLayer : public Layer {
  public:
   static scoped_refptr<PictureLayer> Create(ContentLayerClient* client);
 
   void ClearClient();
 
   // Layer interface.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(
       LayerTreeImpl* tree_impl) OVERRIDE;
@@ skipping 22 matching lines @@
   virtual bool HasDrawableContent() const OVERRIDE;
   void UpdateCanUseLCDText();
 
  private:
   ContentLayerClient* client_;
   scoped_refptr<PicturePile> pile_;
   devtools_instrumentation::
       ScopedLayerObjectTracker instrumentation_object_tracker_;
   // Invalidation to use the next time update is called.
   InvalidationRegion pending_invalidation_;
+  std::vector<DebugRect> debug_invalidation_;
   // Invalidation from the last time update was called.
   Region pile_invalidation_;
+  bool includes_first_paint_invalidation_;
   gfx::Rect last_updated_visible_content_rect_;
   bool is_mask_;
 
   int update_source_frame_number_;
   bool can_use_lcd_text_last_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_H_