Make NativeViewHostAura clipping window non-focusable.

ui/views/controls/native/native_view_host_aura.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 UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/window.h"
@@ skipping 22 matching lines @@
   virtual void UninstallClip() OVERRIDE;
   virtual void ShowWidget(int x, int y, int w, int h) OVERRIDE;
   virtual void HideWidget() OVERRIDE;
   virtual void SetFocus() OVERRIDE;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() OVERRIDE;
   virtual gfx::NativeCursor GetCursor(int x, int y) OVERRIDE;
 
  private:
   friend class NativeViewHostAuraTest;
 
+  class ClippingWindowDelegate;
+
   // Overridden from aura::WindowObserver:
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
 
   // Reparents the native view with the clipping window existing between it and
   // its old parent, so that the fast resize path works.
   void AddClippingWindow();
 
   // If the native view has been reparented via AddClippingWindow, this call
   // undoes it.
   void RemoveClippingWindow();
 
   // Our associated NativeViewHost.
   NativeViewHost* host_;
 
+  scoped_ptr<ClippingWindowDelegate> clipping_window_delegate_;
+
   // Window that exists between the native view and the parent that allows for
   // clipping to occur. This is positioned in the coordinate space of
   // host_->GetWidget().
   aura::Window clipping_window_;
   scoped_ptr<gfx::Rect> clip_rect_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_