Rework tree APIs to reflect Google style and more const-correctness....

views/widget/root_view.h

 // Copyright (c) 2010 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 VIEWS_WIDGET_ROOT_VIEW_H_
 #define VIEWS_WIDGET_ROOT_VIEW_H_
 #pragma once
 
 #include <string>
 
@@ skipping 62 matching lines @@
 
   // Invoked by the Widget to discover what rectangle should be painted.
   const gfx::Rect& GetScheduledPaintRect();
 
   // Returns the region scheduled to paint clipped to the RootViews bounds.
   gfx::Rect GetScheduledPaintRectConstrainedToSize();
 
   // Tree functions
 
   // Get the Widget that hosts this View.
-  virtual Widget* GetWidget() const;
+  virtual const Widget* GetWidget() const;
+  virtual Widget* GetWidget();
 
   // Public API for broadcasting theme change notifications to this View
   // hierarchy.
   void NotifyThemeChanged();
 
   // Public API for broadcasting locale change notifications to this View
   // hierarchy.
   void NotifyLocaleChanged();
 
   // The following event methods are overridden to propagate event to the
@@ skipping 256 matching lines @@
 
 #ifndef NDEBUG
   // True if we're currently processing paint.
   bool is_processing_paint_;
 #endif
   DISALLOW_COPY_AND_ASSIGN(RootView);
 };
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_ROOT_VIEW_H_