Fixes an issue where the MSAA information was not reported back correctly to ...

chrome/browser/renderer_host/render_widget_host_view_win.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/renderer_host/render_widget_host_view_win.h"
 
 #include "app/gfx/canvas.h"
 #include "app/l10n_util.h"
 #include "app/l10n_util_win.h"
 #include "app/resource_bundle.h"
@@ skipping 1182 matching lines @@
   // TODO(jcampan): http://b/issue?id=1432077 Disabling accessibility in the
   // renderer is a temporary work-around until that bug is fixed.
   if (!renderer_accessible_)
     return reference_result;
 
   // Accessibility readers will send an OBJID_CLIENT message.
   if (OBJID_CLIENT == lparam) {
     // If our MSAA DOM root is already created, reuse that pointer. Otherwise,
     // create a new one.
     if (!browser_accessibility_root_) {
-      // Create a new instance of IAccessible. Root id is always 0.
+      // Create a new instance of IAccessible. Root id is 1000, to avoid
+      // conflicts with the ids used by MSAA.
       BrowserAccessibilityManager::GetInstance()->
-          CreateAccessibilityInstance(IID_IAccessible, 0,
+          CreateAccessibilityInstance(IID_IAccessible, 1000,
                                       render_widget_host_->routing_id(),
                                       render_widget_host_->process()->pid(),
                                       m_hWnd, reinterpret_cast<void **>
                                           (&browser_accessibility_root_));
 
       if (!browser_accessibility_root_) {
         // No valid root found, return with failure.
         NOTREACHED();
         return static_cast<LRESULT>(0L);
       }
@@ skipping 91 matching lines @@
     // WM_LBUTTONDOWN.
     SetFocus();
   }
 }
 
 void RenderWidgetHostViewWin::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }