Add a new GetInstance() method for remaining files with singleton classes under chrome/browser.

chrome/browser/upgrade_detector.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/upgrade_detector.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/scoped_ptr.h"
@@ skipping 149 matching lines @@
     detect_upgrade_timer_.Start(
         base::TimeDelta::FromMilliseconds(GetCheckForUpgradeEveryMs()),
         this, &UpgradeDetector::CheckForUpgrade);
   }
 #endif
 }
 
 UpgradeDetector::~UpgradeDetector() {
 }
 
+// static
+UpgradeDetector* UpgradeDetector::GetInstance() {
+  return Singleton<UpgradeDetector>::get();
+}
+
 void UpgradeDetector::CheckForUpgrade() {
   method_factory_.RevokeAll();
   Task* callback_task =
       method_factory_.NewRunnableMethod(&UpgradeDetector::UpgradeDetected);
   // We use FILE as the thread to run the upgrade detection code on all
   // platforms. For Linux, this is because we don't want to block the UI thread
   // while launching a background process and reading its output; on the Mac and
   // on Windows checking for an upgrade requires reading a file.
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
                           new DetectUpgradeTask(callback_task));
@@ skipping 17 matching lines @@
 }
 
 void UpgradeDetector::NotifyOnUpgrade() {
   notify_upgrade_ = true;
 
   NotificationService::current()->Notify(
       NotificationType::UPGRADE_RECOMMENDED,
       Source<UpgradeDetector>(this),
       NotificationService::NoDetails());
 }