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

ash/ime/mode_indicator_view.h

 // Copyright 2014 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 ASH_IME_MODE_INDICATOR_VIEW_H_
 #define ASH_IME_MODE_INDICATOR_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "base/strings/string16.h"
 #include "base/timer/timer.h"
@@ skipping 13 matching lines @@
  public:
   ModeIndicatorView(gfx::NativeView parent,
                     const gfx::Rect& cursor_bounds,
                     const base::string16& label);
   virtual ~ModeIndicatorView();
 
   // Show the mode indicator then hide with fading animation.
   void ShowAndFadeOut();
 
   // views::BubbleDelegateView override:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
 
  protected:
   // views::BubbleDelegateView override:
   virtual void Init() OVERRIDE;
 
   // views::WidgetDelegateView overrides:
   virtual views::NonClientFrameView* CreateNonClientFrameView(
       views::Widget* widget) OVERRIDE;
 
  private:
   gfx::Rect cursor_bounds_;
   views::Label* label_view_;
   base::OneShotTimer<views::Widget> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ModeIndicatorView);
 };
 
 }  // namespace ime
 }  // namespace ash
 
 #endif  // ASH_IME_MODE_INDICATOR_VIEW_H_