ui/views: Fix the signature of View::OnViewAdded/Removed overridden methods.

ui/views/widget/root_view.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_WIDGET_ROOT_VIEW_H_
 #define UI_VIEWS_WIDGET_ROOT_VIEW_H_
 #pragma once
 
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/focus/focus_search.h"
 #include "ui/views/view.h"
 
 namespace ui {
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootView class
 //
 //  A View subclass that owns a View hierarchy. Used by the Widget to perform
 //  View-specific event tracking.
 //
 class RootView : public View,
                  public FocusTraversable {
  public:
   RootView(Widget* widget, View* contents_view);
   virtual ~RootView();
 
   // Overridden from View:
-  virtual void OnViewRemoved(View* parent, View* child) OVERRIDE;
+  virtual void OnViewRemoved(const View& parent, const View& child) OVERRIDE;
   virtual bool OnKeyPressed(const KeyEvent& event) OVERRIDE;
   virtual bool OnKeyReleased(const KeyEvent& event) OVERRIDE;
   virtual bool OnMouseWheel(const MouseWheelEvent& event) OVERRIDE;
   virtual bool OnMousePressed(const MouseEvent& event) OVERRIDE;
   virtual bool OnMouseDragged(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual void OnMouseMoved(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const MouseEvent& event) OVERRIDE;
   virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
@@ skipping 27 matching lines @@
   FocusTraversable* focus_traversable_parent_;
   View* focus_traversable_parent_view_;
 
   DISALLOW_COPY_AND_ASSIGN(RootView);
 };
 
 }  // namespace internal
 }  // namespace ui
 
 #endif  // UI_VIEWS_WIDGET_ROOT_VIEW_H_