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

chrome/browser/gpu_process_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/gpu_process_host.h"
 
 #include "app/app_switches.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/thread.h"
@@ skipping 219 matching lines @@
 
   GpuHostMsg_GetViewXID::WriteReplyParams(reply_msg, xid);
 
   // Have to reply from IO thread.
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       NewRunnableFunction(&SendDelayedReply, reply_msg));
 }
 
 void ReleaseXIDDispatcher(unsigned long xid) {
-  GtkNativeViewManager* manager = Singleton<GtkNativeViewManager>::get();
+  GtkNativeViewManager* manager = GtkNativeViewManager::GetInstance();
   manager->ReleasePermanentXID(xid);
 }
 
 void ResizeXIDDispatcher(unsigned long xid, gfx::Size size,
     IPC::Message *reply_msg) {
   GdkWindow* window = reinterpret_cast<GdkWindow*>(gdk_xid_table_lookup(xid));
   if (window) {
     Display* display = GDK_WINDOW_XDISPLAY(window);
     gdk_window_resize(window, size.width(), size.height());
     XSync(display, False);
@@ skipping 278 matching lines @@
 #elif defined(OS_POSIX)
       false,  // Never use the zygote (GPU plugin can't be sandboxed).
       base::environment_vector(),
 #endif
       cmd_line);
 
   UMA_HISTOGRAM_ENUMERATION("GPU.GPUProcessLifetimeEvents",
                             kLaunched, kGPUProcessLifetimeEvent_Max);
   return true;
 }