Fixes crash in BrowserAccessibilityManager destructor.

chrome/browser/render_widget_host_hwnd.cc

 // Copyright (c) 2006-2008 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/render_widget_host_hwnd.h"
 
 #include "base/command_line.h"
 #include "base/gfx/bitmap_header.h"
 #include "base/gfx/rect.h"
 #include "base/histogram.h"
@@ skipping 755 matching lines @@
         return static_cast<LRESULT>(0L);
       }
 
       CComPtr<IAccessible> accessibility_comptr(accessibility);
 
       // Root id is always 0, to distinguish this particular instance when
       // mapping to the render-side IAccessible.
       accessibility->set_iaccessible_id(0);
 
       // Set the unique member variables of this particular process.
-      accessibility->set_instance_id(BrowserAccessibilityManager::Instance()->
-          SetMembers(accessibility, m_hWnd, render_widget_host_));
+      accessibility->set_instance_id(
+          BrowserAccessibilityManager::GetInstance()->
+              SetMembers(accessibility, m_hWnd, render_widget_host_));
 
       // All is well, assign the temp instance to the class smart pointer.
       browser_accessibility_root_.Attach(accessibility_comptr.Detach());
 
       if (!browser_accessibility_root_) {
         // Paranoia check. Return with failure.
         NOTREACHED();
         return static_cast<LRESULT>(0L);
       }
 
@@ skipping 77 matching lines @@
 
   return TRUE;
 }
 
 void RenderWidgetHostHWND::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }