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

ash/shelf/shelf_tooltip_manager.cc

 // Copyright 2013 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.
 
 #include "ash/shelf/shelf_tooltip_manager.h"
 
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 42 matching lines @@
                         ShelfTooltipManager* host);
 
   void SetText(const base::string16& text);
   void Close();
 
  private:
   // views::WidgetDelegate overrides:
   virtual void WindowClosing() OVERRIDE;
 
   // views::View overrides:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
 
   ShelfTooltipManager* host_;
   views::Label* label_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfTooltipBubble);
 };
 
 ShelfTooltipManager::ShelfTooltipBubble::ShelfTooltipBubble(
     views::View* anchor,
     views::BubbleBorder::Arrow arrow,
@@ skipping 292 matching lines @@
   base::OneShotTimer<ShelfTooltipManager>* new_timer =
       new base::OneShotTimer<ShelfTooltipManager>();
   new_timer->Start(FROM_HERE,
                    base::TimeDelta::FromMilliseconds(delay_in_ms),
                    this,
                    &ShelfTooltipManager::ShowInternal);
   timer_.reset(new_timer);
 }
 
 }  // namespace ash