Fix race in BrowserAccessibilityManagerWin creation.

content/browser/renderer_host/legacy_render_widget_host_win.cc

 // Copyright (c) 2014 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/legacy_render_widget_host_win.h"
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/win/windows_version.h"
 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
@@ skipping 65 matching lines @@
 
 void LegacyRenderWidgetHostHWND::Hide() {
   ::ShowWindow(hwnd(), SW_HIDE);
 }
 
 void LegacyRenderWidgetHostHWND::SetBounds(const gfx::Rect& bounds) {
   ::SetWindowPos(hwnd(), NULL, bounds.x(), bounds.y(), bounds.width(),
                   bounds.height(), 0);
 }
 
-void LegacyRenderWidgetHostHWND::OnFinalMessage(HWND hwnd) {
-  if (manager_)
-    manager_->OnAccessibleHwndDeleted();
-}
-
 LegacyRenderWidgetHostHWND::LegacyRenderWidgetHostHWND(HWND parent)
     : manager_(NULL),
       mouse_tracking_enabled_(false) {
   RECT rect = {0};
   Base::Create(parent, rect, L"Chrome Legacy Window",
                WS_CHILDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
                WS_EX_TRANSPARENT);
 }
 
 bool LegacyRenderWidgetHostHWND::Init() {
@@ skipping 217 matching lines @@
   // generate the legacy WM_VSCROLL/WM_HSCROLL messages.
   // We add these styles to ensure that trackpad/trackpoint scrolling
   // work.
   long current_style = ::GetWindowLong(hwnd(), GWL_STYLE);
   ::SetWindowLong(hwnd(), GWL_STYLE,
                   current_style | WS_VSCROLL | WS_HSCROLL);
   return 0;
 }
 
 }  // namespace content