Create only a single LegacyRenderWidgetHostHWND per WebContentsViewAura.

content/browser/accessibility/browser_accessibility_win_unittest.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 "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_bstr.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_variant.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
 #include "content/browser/accessibility/browser_accessibility_win.h"
-#include "content/browser/renderer_host/legacy_render_widget_host_win.h"
 #include "content/common/accessibility_messages.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/win/atl_module.h"
 
 namespace content {
 namespace {
 
 
 // CountedBrowserAccessibility ------------------------------------------------
 
@@ skipping 648 matching lines @@
   // And the new child exists.
   EXPECT_EQ(ui::AX_ROLE_BUTTON, acc2_2->GetRole());
   EXPECT_EQ(3, acc2_2->GetId());
 
   // Ensure we properly cleaned up.
   manager.reset();
   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 }
 
 }  // namespace content