views: Make view::Views::GetPreferredSize() const.

chrome/browser/ui/views/tabs/tab_strip.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 CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 199 matching lines @@
   virtual bool IsImmersiveStyle() const OVERRIDE;
 
   // MouseWatcherListener overrides:
   virtual void MouseMovedOutOfHost() OVERRIDE;
 
   // views::View overrides:
   virtual void Layout() OVERRIDE;
   virtual void PaintChildren(gfx::Canvas* canvas,
                              const views::CullSet& cull_set) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
   // NOTE: the drag and drop methods are invoked from FrameView. This is done
   // to allow for a drop region that extends outside the bounds of the TabStrip.
   virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
   virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
   virtual void OnDragExited() OVERRIDE;
   virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual views::View* GetEventHandlerForRect(const gfx::Rect& rect) OVERRIDE;
   virtual views::View* GetTooltipHandlerForPoint(
       const gfx::Point& point) OVERRIDE;
@@ skipping 406 matching lines @@
   bool immersive_style_;
 
   // Our observers.
   typedef ObserverList<TabStripObserver> TabStripObservers;
   TabStripObservers observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStrip);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_H_