Add a new GetInstance() method for singleton classes used in chrome/browser files.

chrome/browser/dom_ui/history2_ui.cc

 // Copyright (c) 2010 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 "chrome/browser/dom_ui/history2_ui.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/callback.h"
 #include "base/i18n/time_formatting.h"
@@ skipping 108 matching lines @@
 BrowsingHistoryHandler2::~BrowsingHistoryHandler2() {
   cancelable_search_consumer_.CancelAllRequests();
   cancelable_delete_consumer_.CancelAllRequests();
 }
 
 DOMMessageHandler* BrowsingHistoryHandler2::Attach(DOMUI* dom_ui) {
   // Create our favicon data source.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       NewRunnableMethod(
-          Singleton<ChromeURLDataManager>::get(),
+          ChromeURLDataManager::GetInstance(),
           &ChromeURLDataManager::AddDataSource,
           make_scoped_refptr(new DOMUIFavIconSource(dom_ui->GetProfile()))));
 
   // Get notifications when history is cleared.
   registrar_.Add(this, NotificationType::HISTORY_URLS_DELETED,
       Source<Profile>(dom_ui->GetProfile()->GetOriginalProfile()));
   return DOMMessageHandler::Attach(dom_ui);
 }
 
 void BrowsingHistoryHandler2::RegisterMessages() {
@@ skipping 251 matching lines @@
 
 HistoryUI2::HistoryUI2(TabContents* contents) : DOMUI(contents) {
   AddMessageHandler((new BrowsingHistoryHandler2())->Attach(this));
 
   HistoryUIHTMLSource2* html_source = new HistoryUIHTMLSource2();
 
   // Set up the chrome://history2/ source.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       NewRunnableMethod(
-          Singleton<ChromeURLDataManager>::get(),
+          ChromeURLDataManager::GetInstance(),
           &ChromeURLDataManager::AddDataSource,
           make_scoped_refptr(html_source)));
 }
 
 // static
 const GURL HistoryUI2::GetHistoryURLWithSearchText(const string16& text) {
   return GURL(std::string(chrome::kChromeUIHistory2URL) + "#q=" +
               EscapeQueryParamValue(UTF16ToUTF8(text), true));
 }
 
 // static
 RefCountedMemory* HistoryUI2::GetFaviconResourceBytes() {
   return ResourceBundle::GetSharedInstance().
       LoadDataResourceBytes(IDR_HISTORY_FAVICON);
 }