Improve omnibox accessibility on Windows.

views/view.h

 // Copyright (c) 2011 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.
 
 #ifndef VIEWS_VIEW_H_
 #define VIEWS_VIEW_H_
 #pragma once
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/gfx/compositor/layer_delegate.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 #include "views/accelerator.h"
 #include "views/background.h"
 #include "views/border.h"
 
+#if defined(OS_WIN)
+#include "base/win/scoped_comptr.h"
+#endif
+
 using ui::OSExchangeData;
 
 namespace gfx {
 class Canvas;
 class Insets;
 class Path;
 }
 
 namespace ui {
 struct AccessibleViewState;
 class Compositor;
 class Layer;
 class Texture;
 class ThemeProvider;
 class Transform;
 enum TouchStatus;
 }
 
 #if defined(OS_WIN)
-class NativeViewAccessibilityWin;
+class __declspec(uuid("26f5641a-246d-457b-a96d-07f3fae6acf2"))
+NativeViewAccessibilityWin;
 #endif
 
 namespace views {
 
 class Background;
 class Border;
 class ContextMenuController;
 class DragController;
 class FocusManager;
 class FocusTraversable;
@@ skipping 1380 matching lines @@
   ContextMenuController* context_menu_controller_;
 
   // Drag and drop -------------------------------------------------------------
 
   DragController* drag_controller_;
 
   // Accessibility -------------------------------------------------------------
 
   // The Windows-specific accessibility implementation for this view.
 #if defined(OS_WIN)
-  scoped_refptr<NativeViewAccessibilityWin> native_view_accessibility_win_;
+  base::win::ScopedComPtr<NativeViewAccessibilityWin>
+      native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_VIEW_H_