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

chrome/browser/renderer_host/render_widget_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_widget_host.h"
 
 #include "app/keyboard_codes.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 83 matching lines @@
   if (routing_id_ == MSG_ROUTING_NONE)
     routing_id_ = process_->GetNextRoutingID();
 
   process_->Attach(this, routing_id_);
   // Because the widget initializes as is_hidden_ == false,
   // tell the process host that we're alive.
   process_->WidgetRestored();
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kForceRendererAccessibility) ||
-      Singleton<BrowserAccessibilityState>()->IsAccessibleBrowser()) {
+          BrowserAccessibilityState::GetInstance()->IsAccessibleBrowser()) {
     EnableRendererAccessibility();
   }
 }
 
 RenderWidgetHost::~RenderWidgetHost() {
   // Clear our current or cached backing store if either remains.
   BackingStoreManager::RemoveBackingStore(this);
 
   process_->Release(routing_id_);
 }
@@ skipping 1116 matching lines @@
     return;
 
   for (int i = 0; i < static_cast<int>(deferred_plugin_handles_.size()); i++) {
 #if defined(TOOLKIT_USES_GTK)
     view_->CreatePluginContainer(deferred_plugin_handles_[i]);
 #endif
   }
 
   deferred_plugin_handles_.clear();
 }