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

chrome/browser/renderer_host/render_widget_host_view_mac.mm

 // 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 <QuartzCore/QuartzCore.h>
 
 #include "chrome/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include "app/app_switches.h"
 #include "app/surface/io_surface_support_mac.h"
@@ skipping 506 matching lines @@
       needs_gpu_visibility_update_after_repaint_(false) {
   // |cocoa_view_| owns us and we will be deleted when |cocoa_view_| goes away.
   // Since we autorelease it, our caller must put |native_view()| into the view
   // hierarchy right after calling us.
   cocoa_view_ = [[[RenderWidgetHostViewCocoa alloc]
                   initWithRenderWidgetHostViewMac:this] autorelease];
   render_widget_host_->set_view(this);
 
   // Turn on accessibility only if VoiceOver is running.
   if (IsVoiceOverRunning()) {
-    Singleton<BrowserAccessibilityState>()->OnScreenReaderDetected();
+    BrowserAccessibilityState::GetInstance()->OnScreenReaderDetected();
     render_widget_host_->EnableRendererAccessibility();
   }
 }
 
 RenderWidgetHostViewMac::~RenderWidgetHostViewMac() {
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewMac, RenderWidgetHostView implementation:
 
@@ skipping 2140 matching lines @@
   if (!string) return NO;
 
   // If the user is currently using an IME, confirm the IME input,
   // and then insert the text from the service, the same as TextEdit and Safari.
   [self confirmComposition];
   [self insertText:string];
   return YES;
 }
 
 @end