Mojo: Add/use |typedef std::vector<scoped_refptr<Dispatcher> > DispatcherVector.

mojo/system/message_pipe_dispatcher.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 "mojo/system/message_pipe_dispatcher.h"
 
 #include "base/logging.h"
 #include "mojo/system/channel.h"
 #include "mojo/system/constants.h"
 #include "mojo/system/local_message_pipe_endpoint.h"
@@ skipping 144 matching lines @@
   if (num_bytes > kMaxMessageNumBytes)
     return MOJO_RESULT_RESOURCE_EXHAUSTED;
 
   return message_pipe_->WriteMessage(port_, bytes, num_bytes, transports,
                                      flags);
 }
 
 MojoResult MessagePipeDispatcher::ReadMessageImplNoLock(
     void* bytes,
     uint32_t* num_bytes,
-    std::vector<scoped_refptr<Dispatcher> >* dispatchers,
+    DispatcherVector* dispatchers,
     uint32_t* num_dispatchers,
     MojoReadMessageFlags flags) {
   lock().AssertAcquired();
 
   if (num_bytes) {
     if (!VerifyUserPointer<uint32_t>(num_bytes, 1))
       return MOJO_RESULT_INVALID_ARGUMENT;
     if (!VerifyUserPointer<void>(bytes, *num_bytes))
       return MOJO_RESULT_INVALID_ARGUMENT;
   }
@@ skipping 58 matching lines @@
 
 // MessagePipeDispatcherTransport ----------------------------------------------
 
 MessagePipeDispatcherTransport::MessagePipeDispatcherTransport(
     DispatcherTransport transport) : DispatcherTransport(transport) {
   DCHECK_EQ(message_pipe_dispatcher()->GetType(), Dispatcher::kTypeMessagePipe);
 }
 
 }  // namespace system
 }  // namespace mojo