Changes BookmarkBarView to only create buttons as needed

chrome/browser/ui/views/bookmarks/bookmark_bar_view_test_helper.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 CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_VIEW_TEST_HELPER_H_
 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_VIEW_TEST_HELPER_H_
 
 #include "chrome/browser/ui/views/bookmarks/bookmark_bar_view.h"
 
 // Used to access private state of BookmarkBarView for testing.
 class BookmarkBarViewTestHelper {
  public:
   explicit BookmarkBarViewTestHelper(BookmarkBarView* bbv) : bbv_(bbv) {}
   ~BookmarkBarViewTestHelper() {}
 
   int GetBookmarkButtonCount() { return bbv_->GetBookmarkButtonCount(); }
 
+  views::LabelButton* GetBookmarkButton(int index) {
+    return bbv_->GetBookmarkButton(index);
+  }
+
   views::LabelButton* apps_page_shortcut() { return bbv_->apps_page_shortcut_; }
 
+  views::MenuButton* overflow_button() { return bbv_->overflow_button_; }
+
  private:
   BookmarkBarView* bbv_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkBarViewTestHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_VIEW_TEST_HELPER_H_