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

chrome/browser/ui/views/bookmarks/bookmark_bar_instructions_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 CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/views/context_menu_controller.h"
@@ skipping 13 matching lines @@
 // with a link to import bookmarks. Clicking the link results in notifying the
 // delegate.
 class BookmarkBarInstructionsView : public views::View,
                                     public views::LinkListener,
                                     public views::ContextMenuController {
  public:
   explicit BookmarkBarInstructionsView(
       BookmarkBarInstructionsDelegate* delegate);
 
   // views::View overrides.
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual void OnThemeChanged() OVERRIDE;
   virtual void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
 
   // views::LinkListener overrides.
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
  private:
@@ skipping 13 matching lines @@
   int baseline_;
 
   // Have the colors of the child views been updated? This is initially false
   // and set to true once we have a valid ThemeProvider.
   bool updated_colors_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkBarInstructionsView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_VIEW_H_