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

chrome/browser/renderer_host/render_view_host.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/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 135 matching lines @@
   }
 
   DCHECK(instance_);
   DCHECK(delegate_);
 }
 
 RenderViewHost::~RenderViewHost() {
   delegate()->RenderViewDeleted(this);
 
   // Be sure to clean up any leftover state from cross-site requests.
-  Singleton<CrossSiteRequestManager>()->SetHasPendingCrossSiteRequest(
+  CrossSiteRequestManager::GetInstance()->SetHasPendingCrossSiteRequest(
       process()->id(), routing_id(), false);
 }
 
 bool RenderViewHost::CreateRenderView(const string16& frame_name) {
   DCHECK(!IsRenderViewLive()) << "Creating view twice";
 
   // The process may (if we're sharing a process with another host that already
   // initialized it) or may not (we have our own process or the old process
   // crashed) have been initialized. Calling Init multiple times will be
   // ignored, so this is safe.
@@ skipping 194 matching lines @@
   StopHangMonitorTimeout();
   is_waiting_for_beforeunload_ack_ = false;
   is_waiting_for_unload_ack_ = false;
 
   sudden_termination_allowed_ = true;
   delegate_->Close(this);
 }
 
 void RenderViewHost::SetHasPendingCrossSiteRequest(bool has_pending_request,
                                                    int request_id) {
-  Singleton<CrossSiteRequestManager>()->SetHasPendingCrossSiteRequest(
+  CrossSiteRequestManager::GetInstance()->SetHasPendingCrossSiteRequest(
       process()->id(), routing_id(), has_pending_request);
   pending_request_id_ = request_id;
 }
 
 int RenderViewHost::GetPendingRequestId() {
   return pending_request_id_;
 }
 
 void RenderViewHost::Stop() {
   Send(new ViewMsg_Stop(routing_id()));
@@ skipping 1856 matching lines @@
   if (printer_query.get()) {
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           NewRunnableMethod(printer_query.get(),
                             &printing::PrinterQuery::StopWorker));
   }
 
   // Send the printingDone msg for now.
   Send(new ViewMsg_PrintingDone(routing_id(), -1, true));
 }