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

ash/system/user/user_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_SYSTEM_USER_USER_VIEW_H_
 #define ASH_SYSTEM_USER_USER_VIEW_H_
 
 #include "ash/session/session_state_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/user/login_status.h"
@@ skipping 28 matching lines @@
   virtual ~UserView();
 
   // Overridden from MouseWatcherListener:
   virtual void MouseMovedOutOfHost() OVERRIDE;
 
   TrayUser::TestState GetStateForTest() const;
   gfx::Rect GetBoundsInScreenOfUserButtonForTest();
 
  private:
   // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
-  virtual int GetHeightForWidth(int width) OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
+  virtual int GetHeightForWidth(int width) const OVERRIDE;
   virtual void Layout() OVERRIDE;
 
   // Overridden from views::ButtonListener.
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   void AddLogoutButton(user::LoginStatus login);
   void AddUserCard(user::LoginStatus login);
 
   // Create the menu option to add another user. If |disabled| is set the user
@@ skipping 24 matching lines @@
   // The mouse watcher which takes care of out of window hover events.
   scoped_ptr<views::MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(UserView);
 };
 
 }  // namespace tray
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_USER_USER_VIEW_H_