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

content/browser/accessibility/browser_accessibility_manager_win.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/accessibility/browser_accessibility_manager_win.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 254 matching lines @@
 
   // Do a sequence of Windows-specific updates on each node. Each one is
   // done in a single pass that must complete before the next step starts.
   // The first step moves win_attributes_ to old_win_attributes_ and then
   // recomputes all of win_attributes_ other than IAccessibleText.
   for (size_t i = 0; i < changes.size(); ++i) {
     const ui::AXNode* changed_node = changes[i].node;
     DCHECK(changed_node);
     BrowserAccessibility* obj = GetFromAXNode(changed_node);
     if (obj && obj->IsNative() && !obj->PlatformIsChildOfLeaf())
-      ToBrowserAccessibilityWin(obj)->UpdateStep1ComputeWinAttributes();
+      ToBrowserAccessibilityWin(obj)
+          ->GetCOM()
+          ->UpdateStep1ComputeWinAttributes();
   }
 
   // The next step updates the hypertext of each node, which is a
   // concatenation of all of its child text nodes, so it can't run until
   // the text of all of the nodes was computed in the previous step.
   for (size_t i = 0; i < changes.size(); ++i) {
     const ui::AXNode* changed_node = changes[i].node;
     DCHECK(changed_node);
     BrowserAccessibility* obj = GetFromAXNode(changed_node);
     if (obj && obj->IsNative() && !obj->PlatformIsChildOfLeaf())
-      ToBrowserAccessibilityWin(obj)->UpdateStep2ComputeHypertext();
+      ToBrowserAccessibilityWin(obj)->GetCOM()->UpdateStep2ComputeHypertext();
   }
 
   // The third step fires events on nodes based on what's changed - like
   // if the name, value, or description changed, or if the hypertext had
   // text inserted or removed. It's able to figure out exactly what changed
   // because we still have old_win_attributes_ populated.
   // This step has to run after the previous two steps complete because the
   // client may walk the tree when it receives any of these events.
   // At the end, it deletes old_win_attributes_ since they're not needed
   // anymore.
   for (size_t i = 0; i < changes.size(); ++i) {
     const ui::AXNode* changed_node = changes[i].node;
     DCHECK(changed_node);
     BrowserAccessibility* obj = GetFromAXNode(changed_node);
     if (obj && obj->IsNative() && !obj->PlatformIsChildOfLeaf()) {
-      ToBrowserAccessibilityWin(obj)->UpdateStep3FireEvents(
+      ToBrowserAccessibilityWin(obj)->GetCOM()->UpdateStep3FireEvents(
           changes[i].type == AXTreeDelegate::SUBTREE_CREATED);
     }
   }
 }
 
 }  // namespace content