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diff --git a/content/browser/accessibility/browser_accessibility_mac.h b/content/browser/accessibility/browser_accessibility_mac.h
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+++ b/content/browser/accessibility/browser_accessibility_mac.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MAC_H_
+#define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MAC_H_
+#pragma once
+
+#include <map>
+#include <utility>
+#include <vector>
+
+#include "base/memory/scoped_nsobject.h"
+#include "content/browser/accessibility/browser_accessibility.h"
+
+@class BrowserAccessibilityCocoa;
+
+class BrowserAccessibilityMac : public BrowserAccessibility {
+ public:
+  // Implementation of BrowserAccessibility.
+  virtual void Initialize();
+  virtual void NativeReleaseReference();
+
+  // Overrides from BrowserAccessibility.
+  virtual void DetachTree(std::vector<BrowserAccessibility*>* nodes);
+
+  // The BrowserAccessibilityCocoa associated with us.
+  BrowserAccessibilityCocoa* native_view() const {
+    return browser_accessibility_cocoa_;
+  }
+
+ private:
+  // This gives BrowserAccessibility::Create access to the class constructor.
+  friend class BrowserAccessibility;
+
+  BrowserAccessibilityMac();
+
+  // Allows access to the BrowserAccessibilityCocoa which wraps this.
+  // BrowserAccessibility.
+  // We own this object until our manager calls ReleaseReference;
+  // thereafter, the cocoa object owns us.
+  BrowserAccessibilityCocoa* browser_accessibility_cocoa_;
+  DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityMac);
+};
+
+#endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MAC_H_