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

chrome/browser/browser_main_gtk.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/browser_main_gtk.h"
 
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ skipping 68 matching lines @@
 #if defined(LINUX_SANDBOX_PATH)
   if (!sandbox_binary)
     sandbox_binary = LINUX_SANDBOX_PATH;
 #endif
 
   std::string sandbox_cmd;
   if (sandbox_binary && !parsed_command_line().HasSwitch(switches::kNoSandbox))
     sandbox_cmd = sandbox_binary;
 
   // Tickle the sandbox host and zygote host so they fork now.
-  RenderSandboxHostLinux* shost = Singleton<RenderSandboxHostLinux>::get();
+  RenderSandboxHostLinux* shost = RenderSandboxHostLinux::GetInstance();
   shost->Init(sandbox_cmd);
-  ZygoteHost* zhost = Singleton<ZygoteHost>::get();
+  ZygoteHost* zhost = ZygoteHost::GetInstance();
   zhost->Init(sandbox_cmd);
 }
 
 void DidEndMainMessageLoop() {
 }
 
 void RecordBreakpadStatusUMA(MetricsService* metrics) {
 #if defined(USE_LINUX_BREAKPAD)
   metrics->RecordBreakpadRegistration(IsCrashReporterEnabled());
 #else
@@ skipping 31 matching lines @@
       BrowserX11IOErrorHandler);
 }
 
 #if !defined(OS_CHROMEOS)
 // static
 BrowserMainParts* BrowserMainParts::CreateBrowserMainParts(
     const MainFunctionParams& parameters) {
   return new BrowserMainPartsGtk(parameters);
 }
 #endif