HUD: Show first paint invalidation in red

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 <set>
 #include <string>
 
@@ skipping 106 matching lines @@
 
   void SetMasksToBounds(bool masks_to_bounds);
   bool masks_to_bounds() const { return masks_to_bounds_; }
 
   void SetMaskLayer(Layer* mask_layer);
   Layer* mask_layer() { return mask_layer_.get(); }
   const Layer* mask_layer() const { return mask_layer_.get(); }
 
   virtual void SetNeedsDisplayRect(const gfx::RectF& dirty_rect);
   void SetNeedsDisplay() { SetNeedsDisplayRect(gfx::RectF(bounds())); }
+  void SetIncludesFirstPaintInvalidation() {
+    includes_first_paint_invalidation_ = true;
+  }
 
   void SetOpacity(float opacity);
   float opacity() const { return opacity_; }
   bool OpacityIsAnimating() const;
   virtual bool OpacityCanAnimateOnImplThread() const;
 
   void SetBlendMode(SkXfermode::Mode blend_mode);
   SkXfermode::Mode blend_mode() const { return blend_mode_; }
 
   bool uses_default_blend_mode() const {
@@ skipping 389 matching lines @@
   // 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
   // outside the compositor's control (i.e. plugin layers), this information
   // is not available and the update rect will remain empty.
   // Note this rect is in layer space (not content space).
   gfx::RectF update_rect_;
 
+  bool includes_first_paint_invalidation_;
+
   scoped_refptr<Layer> mask_layer_;
 
   int layer_id_;
 
   // When true, the layer is about to perform an update. Any commit requests
   // will be handled implicitly after the update completes.
   bool ignore_set_needs_commit_;
 
   // Layers that share a sorting context id will be sorted together in 3d
   // space.  0 is a special value that means this layer will not be sorted and
@@ skipping 94 matching lines @@
   DrawProperties<Layer> draw_properties_;
 
   PaintProperties paint_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_