Split out the MSCOM pieces of BrowserAccessibilityWin into a seperate class.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 605 matching lines @@
 #endif
 
 gfx::NativeViewAccessible RenderWidgetHostViewAura::GetNativeViewAccessible() {
 #if defined(OS_WIN)
   aura::WindowTreeHost* host = window_->GetHost();
   if (!host)
     return static_cast<gfx::NativeViewAccessible>(NULL);
   BrowserAccessibilityManager* manager =
       host_->GetOrCreateRootBrowserAccessibilityManager();
   if (manager)
-    return ToBrowserAccessibilityWin(manager->GetRoot());
+    return ToBrowserAccessibilityWin(manager->GetRoot())->GetCOM();
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_X11)
   BrowserAccessibilityManager* manager =
       host_->GetOrCreateRootBrowserAccessibilityManager();
   if (manager)
     return ToBrowserAccessibilityAuraLinux(manager->GetRoot())->GetAtkObject();
 #endif
 
   NOTIMPLEMENTED();
   return static_cast<gfx::NativeViewAccessible>(NULL);
 }
@@ skipping 1737 matching lines @@
 }
 
 void RenderWidgetHostViewAura::UpdateNeedsBeginFramesInternal() {
   if (!delegated_frame_host_)
     return;
   delegated_frame_host_->SetNeedsBeginFrames(needs_begin_frames_ ||
                                              needs_flush_input_);
 }
 
 }  // namespace content