base: eliminate TupleTraits and TupleTypes

ppapi/proxy/nacl_message_scanner.cc

 // Copyright 2013 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.
 
 #include "ppapi/proxy/nacl_message_scanner.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 176 matching lines @@
 }
 
 template <class MessageType>
 class MessageScannerImpl {
  public:
   explicit MessageScannerImpl(const IPC::Message* msg)
       // The cast below is invalid. See https://crbug.com/520760.
       : msg_(static_cast<const MessageType*>(msg)) {
   }
   bool ScanMessage(ScanningResults* results) {
-    typename base::TupleTypes<typename MessageType::Schema::Param>::ValueTuple
-        params;
+    typename MessageType::Param params;
     if (!MessageType::Read(msg_, &params))
       return false;
     ScanTuple(params, results);
     return true;
   }
 
   bool ScanSyncMessage(ScanningResults* results) {
-    typename base::TupleTypes<typename MessageType::Schema::SendParam>
-        ::ValueTuple params;
+    typename MessageType::SendParam params;
     if (!MessageType::ReadSendParam(msg_, &params))
       return false;
     // If we need to rewrite the message, write the message id first.
     if (results->new_msg) {
       results->new_msg->set_sync();
       int id = IPC::SyncMessage::GetMessageId(*msg_);
       results->new_msg->WriteInt(id);
     }
     ScanTuple(params, results);
     return true;
   }
 
   bool ScanReply(ScanningResults* results) {
-    typename base::TupleTypes<typename MessageType::Schema::ReplyParam>
-        ::ValueTuple params;
+    typename MessageType::ReplyParam params;
     if (!MessageType::ReadReplyParam(msg_, &params))
       return false;
     // If we need to rewrite the message, write the message id first.
     if (results->new_msg) {
       results->new_msg->set_reply();
       int id = IPC::SyncMessage::GetMessageId(*msg_);
       results->new_msg->WriteInt(id);
     }
     ScanTuple(params, results);
     return true;
@@ skipping 328 matching lines @@
             fio_it->second->SetMaxWrittenOffset(offset_it->second);
         }
       }
       break;
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi