Add debug shortcuts that toggles options to shows paint rects

ui/compositor/compositor.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_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <string>
 
 #include "base/hash_tables.h"
@@ skipping 13 matching lines @@
 
 class SkBitmap;
 
 namespace base {
 class RunLoop;
 }
 
 namespace cc {
 class ContextProvider;
 class Layer;
+class LayerTreeDebugState;
 class LayerTreeHost;
 }
 
 namespace gfx {
 class GLContext;
 class GLSurface;
 class GLShareGroup;
 class Point;
 class Rect;
 }
@@ skipping 312 matching lines @@
   virtual scoped_refptr<cc::ContextProvider>
       OffscreenContextProviderForMainThread() OVERRIDE;
   virtual scoped_refptr<cc::ContextProvider>
       OffscreenContextProviderForCompositorThread() OVERRIDE;
 
   int last_started_frame() { return last_started_frame_; }
   int last_ended_frame() { return last_ended_frame_; }
 
   bool IsLocked() { return compositor_lock_ != NULL; }
 
+  const cc::LayerTreeDebugState& GetLayerTreeDebugState() const;
+  void SetLayerTreeDebugState(const cc::LayerTreeDebugState& debug_state);
+
  private:
   friend class base::RefCounted<Compositor>;
   friend class CompositorLock;
 
   // Called by CompositorLock.
   void UnlockCompositor();
 
   // Called to release any pending CompositorLock
   void CancelCompositorLock();
 
@@ skipping 27 matching lines @@
   bool disable_schedule_composite_;
 
   CompositorLock* compositor_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_