Supporting command line argument to force field trials

chrome/browser/ui/webui/ntp/new_tab_ui.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 "build/build_config.h"
 
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
 
 #include <set>
 
@@ skipping 254 matching lines @@
   NewTabPageHandler::RegisterUserPrefs(prefs);
   AppLauncherHandler::RegisterUserPrefs(prefs);
   MostVisitedHandler::RegisterUserPrefs(prefs);
   if (NewTabUI::IsSuggestionsPageEnabled())
     SuggestionsHandler::RegisterUserPrefs(prefs);
 }
 
 // static
 void NewTabUI::SetupFieldTrials() {
   scoped_refptr<base::FieldTrial> trial(
-      new base::FieldTrial(kWebStoreLinkExperiment, 3, "Disabled",
-                           2012, 6, 1));
+      base::FieldTrial::CreateInstance(kWebStoreLinkExperiment, 3, "Disabled",
+                                       2012, 6, 1));
 
   // Try to give the user a consistent experience, if possible.
   if (base::FieldTrialList::IsOneTimeRandomizationEnabled())
     trial->UseOneTimeRandomization();
 
   // 33.3% in each group.
   g_footer_group = trial->AppendGroup("FooterLink", 1);
   g_hint_group = trial->AppendGroup("PlusIcon", 1);
 }
 
@@ skipping 127 matching lines @@
 }
 
 void NewTabUI::NewTabHTMLSource::AddResource(const char* resource,
                                              const char* mime_type,
                                              int resource_id) {
   DCHECK(resource);
   DCHECK(mime_type);
   resource_map_[std::string(resource)] =
       std::make_pair(std::string(mime_type), resource_id);
 }