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diff --git a/chrome/renderer/indexed_db_dispatcher.h b/chrome/renderer/indexed_db_dispatcher.h
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+++ b/chrome/renderer/indexed_db_dispatcher.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 CHROME_RENDERER_INDEXED_DB_DISPATCHER_H_
+#define CHROME_RENDERER_INDEXED_DB_DISPATCHER_H_
+
+#include "base/id_map.h"
+#include "base/string16.h"
+#include "ipc/ipc_message.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebIDBCallbacks.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebIDBDatabase.h"
+
+namespace WebKit {
+class WebFrame;
+}
+
+// Handle the indexed db related communication for this entire renderer.
+class IndexedDBDispatcher {
+ public:
+  IndexedDBDispatcher();
+  ~IndexedDBDispatcher();
+
+  // Called to possibly handle the incoming IPC message. Returns true if
+  // handled.
+  bool OnMessageReceived(const IPC::Message& msg);
+
+  void RequestIndexedDatabaseOpen(
+      const string16& name, const string16& description, bool modify_database,
+      WebKit::WebIDBCallbacks* callbacks, const string16& origin,
+      WebKit::WebFrame* web_frame, int* exception_code);
+
+  void SendIDBDatabaseDestroyed(int32 idb_database_id_);
+
+ private:
+  // Message handlers.  For each message we send, we need to handle both the
+  // success and the error case.
+  void OnIndexedDatabaseOpenSuccess(int32 response_id,
+                                    int32 idb_database_id);
+  void OnIndexedDatabaseOpenError(int32 response_id, int code,
+                                  const string16& message);
+
+  // Careful! WebIDBCallbacks wraps non-threadsafe data types. It must be
+  // destroyed and used on the same thread it was created on.
+  IDMap<WebKit::WebIDBCallbacks, IDMapOwnPointer>
+      indexed_database_open_callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
+};
+
+#endif  // CHROME_RENDERER_INDEXED_DB_DISPATCHER_H_