Move Tuple to base namespace.

ipc/ipc_message_utils_impl.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.
 //
 // This file contains templates forward declared (but not defined) in
 // ipc_message_utils.h so that they are only instantiated in certain files,
 // notably a few IPC unit tests.
 
 #ifndef IPC_IPC_MESSAGE_UTILS_IMPL_H_
 #define IPC_IPC_MESSAGE_UTILS_IMPL_H_
@@ skipping 23 matching lines @@
 
 template <class SendParamType, class ReplyParamType>
 bool SyncMessageSchema<SendParamType, ReplyParamType>::ReadSendParam(
     const Message* msg, SendParam* p) {
   PickleIterator iter = SyncMessage::GetDataIterator(msg);
   return ReadParam(msg, &iter, p);
 }
 
 template <class SendParamType, class ReplyParamType>
 bool SyncMessageSchema<SendParamType, ReplyParamType>::ReadReplyParam(
-    const Message* msg, typename TupleTypes<ReplyParam>::ValueTuple* p) {
+    const Message* msg, typename base::TupleTypes<ReplyParam>::ValueTuple* p) {
   PickleIterator iter = SyncMessage::GetDataIterator(msg);
   return ReadParam(msg, &iter, p);
 }
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_IMPL_H_