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

ui/app_list/views/contents_view.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 UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 52 matching lines @@
   // Sets show state and animates the subviews to match the show state.
   void SetShowState(ShowState show_state);
 
   void Prerender();
 
   AppsContainerView* apps_container_view() { return apps_container_view_; }
 
   ShowState show_state() const { return show_state_; }
 
   // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual bool OnMouseWheel(const ui::MouseWheelEvent& event) OVERRIDE;
 
  private:
   // Invoked when show state is changed.
   void ShowStateChanged();
 
   void CalculateIdealBounds();
   void AnimateToIdealBounds();
@@ skipping 10 matching lines @@
 
   scoped_ptr<views::ViewModel> view_model_;
   scoped_ptr<views::BoundsAnimator> bounds_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_