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diff --git a/content/browser/in_process_webkit/dom_storage_area.h b/content/browser/in_process_webkit/dom_storage_area.h
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+++ b/content/browser/in_process_webkit/dom_storage_area.h
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+// Copyright (c) 2010 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_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_
+#define CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_
+#pragma once
+
+#include "base/hash_tables.h"
+#include "base/nullable_string16.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "base/string16.h"
+#include "chrome/common/dom_storage_common.h"
+#include "googleurl/src/gurl.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageArea.h"
+
+class DOMStorageNamespace;
+class HostContentSettingsMap;
+
+// Only use on the WebKit thread.  DOMStorageNamespace manages our registration
+// with DOMStorageContext.
+class DOMStorageArea {
+ public:
+  DOMStorageArea(const string16& origin,
+                 int64 id,
+                 DOMStorageNamespace* owner,
+                 HostContentSettingsMap* host_content_settings_map);
+  ~DOMStorageArea();
+
+  unsigned Length();
+  NullableString16 Key(unsigned index);
+  NullableString16 GetItem(const string16& key);
+  NullableString16 SetItem(
+      const string16& key, const string16& value,
+      WebKit::WebStorageArea::Result* result);
+  NullableString16 RemoveItem(const string16& key);
+  bool Clear();
+  void PurgeMemory();
+
+  int64 id() const { return id_; }
+
+  DOMStorageNamespace* owner() const { return owner_; }
+
+ private:
+  // Creates the underlying WebStorageArea on demand.
+  void CreateWebStorageAreaIfNecessary();
+
+  // Used to see if setItem has permission to do its thing.
+  bool CheckContentSetting(const string16& key, const string16& value);
+
+  // The origin this storage area represents.
+  string16 origin_;
+  GURL origin_url_;
+
+  // The storage area we wrap.
+  scoped_ptr<WebKit::WebStorageArea> storage_area_;
+
+  // Our storage area id.  Unique to our parent WebKitContext.
+  int64 id_;
+
+  // The DOMStorageNamespace that owns us.
+  DOMStorageNamespace* owner_;
+
+  scoped_refptr<HostContentSettingsMap> host_content_settings_map_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageArea);
+};
+
+#if defined(COMPILER_GCC)
+namespace __gnu_cxx {
+
+template<>
+struct hash<DOMStorageArea*> {
+  std::size_t operator()(DOMStorageArea* const& p) const {
+    return reinterpret_cast<std::size_t>(p);
+  }
+};
+
+}  // namespace __gnu_cxx
+#endif
+
+#endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_