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

chrome/browser/ui/views/bookmarks/bookmark_bar_view_test.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 183 matching lines @@
     browser_content_client_.reset();
     content_client_.reset();
     content::SetContentClient(NULL);
   }
 
  protected:
   virtual views::View* CreateContentsView() OVERRIDE {
     return bb_view_.get();
   }
 
-  virtual gfx::Size GetPreferredSize() OVERRIDE { return bb_view_pref_; }
+  virtual gfx::Size GetPreferredSize() const OVERRIDE { return bb_view_pref_; }
 
   views::TextButton* GetBookmarkButton(int view_index) {
     return bb_view_->GetBookmarkButton(view_index);
   }
 
   // See comment above class description for what this does.
   virtual bool CreateBigMenu() { return false; }
 
   BookmarkModel* model_;
   scoped_ptr<BookmarkBarView> bb_view_;
@@ skipping 1616 matching lines @@
     EXPECT_TRUE(bb_view_->GetContextMenu() == NULL);
     EXPECT_TRUE(bb_view_->GetMenu() == NULL);
 
     Done();
   }
 
   BookmarkContextMenuNotificationObserver observer_;
 };
 
 VIEW_TEST(BookmarkBarViewTest21, ContextMenusForEmptyFolder)