Proper MouseEvent targeting. Adds a Window method that locates a Window for a given point.

aura/window_delegate.h

 // Copyright (c) 2011 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 AURA_WINDOW_DELEGATE_H_
 #define AURA_WINDOW_DELEGATE_H_
 #pragma once
 
 namespace gfx {
 class Canvas;
 }
 
 namespace aura {
 
+class MouseEvent;
+
 // Delegate interface for aura::Window.
 class WindowDelegate {
  public:
+  virtual bool OnMouseEvent(const MouseEvent& event) = 0;
+
   // Asks the delegate to paint window contents into the supplied canvas.
-   virtual void OnPaint(gfx::Canvas* canvas) = 0;
+  virtual void OnPaint(gfx::Canvas* canvas) = 0;
+
+  // Called when the Window has been destroyed (i.e. from its destructor).
+  // The delegate can use this as an opportunity to delete itself if necessary.
+  virtual void OnWindowDestroyed() = 0;
 
  protected:
   virtual ~WindowDelegate() {}
 };
 
 }  // namespace aura
 
 #endif  // AURA_WINDOW_DELEGATE_H_