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diff --git a/views/accessibility/native_view_accessibility_win.h b/views/accessibility/native_view_accessibility_win.h
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+++ b/views/accessibility/native_view_accessibility_win.h
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+// 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_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
+#define VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
+#pragma once
+
+#include <atlbase.h>
+#include <atlcom.h>
+
+#include <oleacc.h>
+
+#include "base/scoped_ptr.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "views/controls/native/native_view_host.h"
+#include "views/view.h"
+
+namespace views {
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// NativeViewAccessibilityWin
+//
+// Class implementing the MSAA IAccessible COM interface for a generic View,
+// providing accessibility to be used by screen readers and other assistive
+// technology (AT).
+//
+////////////////////////////////////////////////////////////////////////////////
+class ATL_NO_VTABLE NativeViewAccessibilityWin
+  : public CComObjectRootEx<CComMultiThreadModel>,
+    public IDispatchImpl<IAccessible, &IID_IAccessible, &LIBID_Accessibility> {
+ public:
+  BEGIN_COM_MAP(NativeViewAccessibilityWin)
+    COM_INTERFACE_ENTRY2(IDispatch, IAccessible)
+    COM_INTERFACE_ENTRY(IAccessible)
+  END_COM_MAP()
+
+  // Create method for view accessibility.
+  static scoped_refptr<NativeViewAccessibilityWin> Create(views::View* view);
+
+  // Returns the IAccessible interface for a view.
+  static IAccessible* GetAccessibleForView(views::View* view);
+
+  virtual ~NativeViewAccessibilityWin();
+
+  void set_view(views::View* view) { view_ = view; }
+
+  // Supported IAccessible methods.
+
+  // Retrieves the child element or child object at a given point on the screen.
+  STDMETHODIMP accHitTest(LONG x_left, LONG y_top, VARIANT* child);
+
+  // Performs the object's default action.
+  STDMETHODIMP accDoDefaultAction(VARIANT var_id);
+
+  // Retrieves the specified object's current screen location.
+  STDMETHODIMP accLocation(LONG* x_left,
+                           LONG* y_top,
+                           LONG* width,
+                           LONG* height,
+                           VARIANT var_id);
+
+  // Traverses to another UI element and retrieves the object.
+  STDMETHODIMP accNavigate(LONG nav_dir, VARIANT start, VARIANT* end);
+
+  // Retrieves an IDispatch interface pointer for the specified child.
+  STDMETHODIMP get_accChild(VARIANT var_child, IDispatch** disp_child);
+
+  // Retrieves the number of accessible children.
+  STDMETHODIMP get_accChildCount(LONG* child_count);
+
+  // Retrieves a string that describes the object's default action.
+  STDMETHODIMP get_accDefaultAction(VARIANT var_id, BSTR* default_action);
+
+  // Retrieves the tooltip description.
+  STDMETHODIMP get_accDescription(VARIANT var_id, BSTR* desc);
+
+  // Retrieves the object that has the keyboard focus.
+  STDMETHODIMP get_accFocus(VARIANT* focus_child);
+
+  // Retrieves the specified object's shortcut.
+  STDMETHODIMP get_accKeyboardShortcut(VARIANT var_id, BSTR* access_key);
+
+  // Retrieves the name of the specified object.
+  STDMETHODIMP get_accName(VARIANT var_id, BSTR* name);
+
+  // Retrieves the IDispatch interface of the object's parent.
+  STDMETHODIMP get_accParent(IDispatch** disp_parent);
+
+  // Retrieves information describing the role of the specified object.
+  STDMETHODIMP get_accRole(VARIANT var_id, VARIANT* role);
+
+  // Retrieves the current state of the specified object.
+  STDMETHODIMP get_accState(VARIANT var_id, VARIANT* state);
+
+  // Retrieves the current value associated with the specified object.
+  STDMETHODIMP get_accValue(VARIANT var_id, BSTR* value);
+
+  // Non-supported IAccessible methods.
+
+  // Selections not applicable to views.
+  STDMETHODIMP get_accSelection(VARIANT* selected);
+  STDMETHODIMP accSelect(LONG flags_sel, VARIANT var_id);
+
+  // Help functions not supported.
+  STDMETHODIMP get_accHelp(VARIANT var_id, BSTR* help);
+  STDMETHODIMP get_accHelpTopic(BSTR* help_file,
+                                VARIANT var_id,
+                                LONG* topic_id);
+
+  // Deprecated functions, not implemented here.
+  STDMETHODIMP put_accName(VARIANT var_id, BSTR put_name);
+  STDMETHODIMP put_accValue(VARIANT var_id, BSTR put_val);
+
+  // Returns a conversion from the event (as defined in accessibility_types.h)
+  // to an MSAA event.
+  static int32 MSAAEvent(ui::AccessibilityTypes::Event event);
+
+  // Returns a conversion from the Role (as defined in accessibility_types.h)
+  // to an MSAA role.
+  static int32 MSAARole(ui::AccessibilityTypes::Role role);
+
+  // Returns a conversion from the State (as defined in accessibility_types.h)
+  // to MSAA states set.
+  static int32 MSAAState(ui::AccessibilityTypes::State state);
+
+ private:
+  NativeViewAccessibilityWin();
+
+  // Determines navigation direction for accNavigate, based on left, up and
+  // previous being mapped all to previous and right, down, next being mapped
+  // to next. Returns true if navigation direction is next, false otherwise.
+  bool IsNavDirNext(int nav_dir) const;
+
+  // Determines if the navigation target is within the allowed bounds. Returns
+  // true if it is, false otherwise.
+  bool IsValidNav(int nav_dir,
+                  int start_id,
+                  int lower_bound,
+                  int upper_bound) const;
+
+  // Determines if the child id variant is valid.
+  bool IsValidId(const VARIANT& child) const;
+
+  // Helper function which sets applicable states of view.
+  void SetState(VARIANT* msaa_state, views::View* view);
+
+  // Returns the IAccessible interface for a native view if applicable.
+  // Returns S_OK on success.
+  static HRESULT GetNativeIAccessibleInterface(
+      views::NativeViewHost* native_host, IAccessible** accessible);
+
+  static HRESULT GetNativeIAccessibleInterface(
+      HWND native_view_window, IAccessible** accessible);
+
+  // Give CComObject access to the class constructor.
+  template <class Base> friend class CComObject;
+
+  // Member View needed for view-specific calls.
+  views::View* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeViewAccessibilityWin);
+};
+
+extern const char kViewsNativeHostPropForAccessibility[];
+
+}  // namespace views
+
+#endif  // VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_