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diff --git a/content/browser/in_process_webkit/indexed_db_callbacks.h b/content/browser/in_process_webkit/indexed_db_callbacks.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_INDEXED_DB_CALLBACKS_H_
+#define CONTENT_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+#include "content/browser/in_process_webkit/indexed_db_dispatcher_host.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBCallbacks.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBCursor.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBDatabaseError.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBTransaction.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBTransactionCallbacks.h"
+
+class IndexedDBMsg_CallbacksSuccessIDBDatabase;
+class IndexedDBMsg_CallbacksSuccessIDBIndex;
+class IndexedDBMsg_CallbacksSuccessIDBObjectStore;
+class IndexedDBMsg_CallbacksSuccessIDBTransaction;
+
+// Template magic to figure out what message to send to the renderer based on
+// which (overloaded) onSuccess method we expect to be called.
+template <class Type> struct WebIDBToMsgHelper { };
+template <> struct WebIDBToMsgHelper<WebKit::WebIDBDatabase> {
+  typedef IndexedDBMsg_CallbacksSuccessIDBDatabase MsgType;
+};
+template <> struct WebIDBToMsgHelper<WebKit::WebIDBIndex> {
+  typedef IndexedDBMsg_CallbacksSuccessIDBIndex MsgType;
+};
+template <> struct WebIDBToMsgHelper<WebKit::WebIDBObjectStore> {
+  typedef IndexedDBMsg_CallbacksSuccessIDBObjectStore MsgType;
+};
+template <> struct WebIDBToMsgHelper<WebKit::WebIDBTransaction> {
+  typedef IndexedDBMsg_CallbacksSuccessIDBTransaction MsgType;
+};
+
+// The code the following two classes share.
+class IndexedDBCallbacksBase : public WebKit::WebIDBCallbacks {
+ public:
+  IndexedDBCallbacksBase(IndexedDBDispatcherHost* dispatcher_host,
+                         int32 response_id);
+
+  virtual ~IndexedDBCallbacksBase();
+
+  virtual void onError(const WebKit::WebIDBDatabaseError& error);
+  virtual void onBlocked();
+
+ protected:
+  IndexedDBDispatcherHost* dispatcher_host() const {
+    return dispatcher_host_.get();
+  }
+  int32 response_id() const { return response_id_; }
+
+ private:
+  scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
+  int32 response_id_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacksBase);
+};
+
+// A WebIDBCallbacks implementation that returns an object of WebObjectType.
+template <class WebObjectType>
+class IndexedDBCallbacks : public IndexedDBCallbacksBase {
+ public:
+  IndexedDBCallbacks(
+      IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
+      : IndexedDBCallbacksBase(dispatcher_host, response_id) { }
+
+  virtual void onSuccess(WebObjectType* idb_object) {
+    int32 object_id = dispatcher_host()->Add(idb_object);
+    dispatcher_host()->Send(
+        new typename WebIDBToMsgHelper<WebObjectType>::MsgType(response_id(),
+                                                               object_id));
+  }
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
+};
+
+// WebIDBCursor uses onSuccess(WebIDBCursor*) to indicate it has data, and
+// onSuccess() without params to indicate it does not contain any data, i.e.,
+// there is no key within the key range, or it has reached the end.
+template <>
+class IndexedDBCallbacks<WebKit::WebIDBCursor>
+    : public IndexedDBCallbacksBase {
+ public:
+  IndexedDBCallbacks(
+      IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
+      : IndexedDBCallbacksBase(dispatcher_host, response_id) { }
+
+  virtual void onSuccess(WebKit::WebIDBCursor* idb_object);
+  virtual void onSuccess(const WebKit::WebSerializedScriptValue& value);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
+};
+
+// WebIDBKey is implemented in WebKit as opposed to being an interface Chromium
+// implements.  Thus we pass a const ___& version and thus we need this
+// specialization.
+template <>
+class IndexedDBCallbacks<WebKit::WebIDBKey>
+    : public IndexedDBCallbacksBase {
+ public:
+  IndexedDBCallbacks(
+      IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
+      : IndexedDBCallbacksBase(dispatcher_host, response_id) { }
+
+  virtual void onSuccess(const WebKit::WebIDBKey& value);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
+};
+
+// WebSerializedScriptValue is implemented in WebKit as opposed to being an
+// interface Chromium implements.  Thus we pass a const ___& version and thus
+// we need this specialization.
+template <>
+class IndexedDBCallbacks<WebKit::WebSerializedScriptValue>
+    : public IndexedDBCallbacksBase {
+ public:
+  IndexedDBCallbacks(
+      IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
+      : IndexedDBCallbacksBase(dispatcher_host, response_id) { }
+
+  virtual void onSuccess(const WebKit::WebSerializedScriptValue& value);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
+};
+
+class IndexedDBTransactionCallbacks
+    : public WebKit::WebIDBTransactionCallbacks {
+ public:
+  IndexedDBTransactionCallbacks(IndexedDBDispatcherHost* dispatcher_host,
+                                int transaction_id);
+
+  virtual ~IndexedDBTransactionCallbacks();
+
+  virtual void onAbort();
+
+  virtual void onComplete();
+
+  virtual void onTimeout();
+
+ private:
+  scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
+  int transaction_id_;
+};
+
+#endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_