IndexedDB: Fix trivial cpplint.py errors

content/common/indexed_db/indexed_db_messages.h

 // Copyright (c) 2012 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.
 
 // Message definition file, included multiple times, hence no include guard.
 
+#include <string>
 #include <utility>
 #include <vector>
 
 #include "content/common/indexed_db/indexed_db_key.h"
 #include "content/common/indexed_db/indexed_db_key_path.h"
 #include "content/common/indexed_db/indexed_db_key_range.h"
 #include "content/common/indexed_db/indexed_db_param_traits.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
 #include "third_party/WebKit/public/platform/WebIDBCursor.h"
@@ skipping 394 matching lines @@
                      base::string16) /* message */
 IPC_MESSAGE_CONTROL3(IndexedDBMsg_DatabaseCallbacksComplete,
                      int32, /* ipc_thread_id */
                      int32, /* ipc_database_callbacks_id */
                      int64) /* transaction_id */
 
 // Indexed DB messages sent from the renderer to the browser.
 
 // WebIDBCursor::advance() message.
 IPC_MESSAGE_CONTROL4(IndexedDBHostMsg_CursorAdvance,
-                     int32, /* ipc_cursor_id */
-                     int32, /* ipc_thread_id */
-                     int32, /* ipc_callbacks_id */
-                     unsigned long) /* count */
+                     int32,  /* ipc_cursor_id */
+                     int32,  /* ipc_thread_id */
+                     int32,  /* ipc_callbacks_id */
+                     uint32) /* count */
 
 // WebIDBCursor::continue() message.
 IPC_MESSAGE_CONTROL5(IndexedDBHostMsg_CursorContinue,
                      int32, /* ipc_cursor_id */
                      int32, /* ipc_thread_id */
                      int32, /* ipc_callbacks_id */
                      content::IndexedDBKey, /* key */
                      content::IndexedDBKey) /* primary_key */
 
 // WebIDBCursor::prefetchContinue() message.
@@ skipping 102 matching lines @@
                      int64) /* transaction_id */
 
 // WebIDBDatabase::commit() message.
 IPC_MESSAGE_CONTROL2(IndexedDBHostMsg_DatabaseCommit,
                      int32, /* ipc_database_id */
                      int64) /* transaction_id */
 
 // WebIDBDatabase::~WebIDBCursor() message.
 IPC_MESSAGE_CONTROL1(IndexedDBHostMsg_CursorDestroyed,
                      int32 /* ipc_cursor_id */)