DevTools: Change paint rectangles' colors in compositor to shades of green.

cc/layers/heads_up_display_layer_impl.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_HEADS_UP_DISPLAY_LAYER_IMPL_H_
 #define CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 101 matching lines @@
                       DebugRectHistory* debug_rect_history) const;
 
   scoped_ptr<ScopedResource> hud_resource_;
   scoped_ptr<SkCanvas> hud_canvas_;
 
   skia::RefPtr<SkTypeface> typeface_;
 
   Graph fps_graph_;
   Graph paint_time_graph_;
   MemoryHistory::Entry memory_entry_;
+  mutable int current_paint_rect_color_;

[danakj, 2014/02/10 16:11:12]

why mutable?

 
   base::TimeTicks time_of_last_graph_update_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadsUpDisplayLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_HEADS_UP_DISPLAY_LAYER_IMPL_H_