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

chrome/browser/gtk/browser_window_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/gtk/browser_window_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include <string>
 
@@ skipping 1186 matching lines @@
   // Do nothing if we're in the process of closing the browser window.
   if (!window_)
     return;
 
   bool is_active = (GTK_WIDGET(window_)->window == active_window);
   bool changed = (is_active != is_active_);
 
   if (is_active && changed) {
     // If there's an app modal dialog (e.g., JS alert), try to redirect
     // the user's attention to the window owning the dialog.
-    if (Singleton<AppModalDialogQueue>()->HasActiveDialog()) {
-      Singleton<AppModalDialogQueue>()->ActivateModalDialog();
+    if (AppModalDialogQueue::GetInstance()->HasActiveDialog()) {
+      AppModalDialogQueue::GetInstance()->ActivateModalDialog();
       return;
     }
   }
 
   is_active_ = is_active;
   if (changed) {
     SetBackgroundColor();
     gdk_window_invalidate_rect(GTK_WIDGET(window_)->window,
                                &GTK_WIDGET(window_)->allocation, TRUE);
     // For some reason, the above two calls cause the window shape to be
@@ skipping 1015 matching lines @@
   // special-case the ones where the custom frame should be used.  These names
   // are taken from the WMs' source code.
   return (wm_name == "Blackbox" ||
           wm_name == "compiz" ||
           wm_name == "e16" ||  // Enlightenment DR16
           wm_name == "Metacity" ||
           wm_name == "Mutter" ||
           wm_name == "Openbox" ||
           wm_name == "Xfwm4");
 }