Clip constrained windows to the tabcontents bounds.

ui/gfx/compositor/layer.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_GFX_COMPOSITOR_LAYER_H_
 #define UI_GFX_COMPOSITOR_LAYER_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 110 matching lines @@
   Transform GetTargetTransform() const;
 
   // The bounds, relative to the parent.
   void SetBounds(const gfx::Rect& bounds);
   const gfx::Rect& bounds() const { return bounds_; }
 
   // Return the target bounds if animator is running, or the current bounds
   // otherwise.
   gfx::Rect GetTargetBounds() const;
 
+  // Sets/gets whether or not drawing of child layers should be clipped to the
+  // bounds of this layer.
+  void SetMasksToBounds(bool masks_to_bounds);
+  bool GetMasksToBounds() const;
+
   // The opacity of the layer. The opacity is applied to each pixel of the
   // texture (resulting alpha = opacity * alpha).
   float opacity() const { return opacity_; }
   void SetOpacity(float opacity);
 
   // Return the target opacity if animator is running, or the current opacity
   // otherwise.
   float GetTargetOpacity() const;
 
   // Sets the visibility of the Layer. A Layer may be visible but not
@@ skipping 151 matching lines @@
   WebKit::WebLayer web_layer_;
   bool web_layer_is_accelerated_;
   bool show_debug_borders_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_GFX_COMPOSITOR_LAYER_H_