Cleanup: Remove unneeded includes of pref_names.h

chrome/browser/bookmarks/bookmark_context_menu_controller_unittest.cc

 // Copyright (c) 2011 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 <string>
+
 #include "base/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/bookmarks/bookmark_context_menu_controller.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tab_contents/page_navigator.h"
-#include "chrome/common/pref_names.h"
 #include "chrome/test/testing_profile.h"
 #include "grit/generated_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/ui/views/bookmark_bar_view.h"
 #endif
 
 // PageNavigator implementation that records the URL.
 class TestingPageNavigator : public PageNavigator {
@@ skipping 282 matching lines @@
             model_->GetBookmarkBarNode()->GetChild(1)->GetURL());
 
   controller.reset(new BookmarkContextMenuController(
       NULL, NULL, profile_.get(), NULL, nodes[0]->GetParent(), nodes));
   // Cut the URL.
   controller->ExecuteCommand(IDC_CUT);
   ASSERT_TRUE(model_->GetBookmarkBarNode()->GetChild(0)->is_url());
   ASSERT_TRUE(model_->GetBookmarkBarNode()->GetChild(1)->is_folder());
   ASSERT_EQ(old_count, model_->GetBookmarkBarNode()->GetChildCount());
 }