Mojo: Add a "GetType()" to Dispatchers.

mojo/system/data_pipe_producer_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/data_pipe_producer_dispatcher.h"
 
 #include "base/logging.h"
 #include "mojo/system/data_pipe.h"
 #include "mojo/system/memory.h"
 
 namespace mojo {
 namespace system {
 
 DataPipeProducerDispatcher::DataPipeProducerDispatcher() {
 }
 
 void DataPipeProducerDispatcher::Init(scoped_refptr<DataPipe> data_pipe) {
   DCHECK(data_pipe.get());
   data_pipe_ = data_pipe;
 }
 
+Dispatcher::Type DataPipeProducerDispatcher::GetType() {
+  return kTypeDataPipeProducer;
+}
+
 DataPipeProducerDispatcher::~DataPipeProducerDispatcher() {
   // |Close()|/|CloseImplNoLock()| should have taken care of the pipe.
   DCHECK(!data_pipe_.get());
 }
 
 void DataPipeProducerDispatcher::CancelAllWaitersNoLock() {
   lock().AssertAcquired();
   data_pipe_->ProducerCancelAllWaiters();
 }
 
@@ skipping 65 matching lines @@
 
   scoped_refptr<DataPipeProducerDispatcher> rv =
       new DataPipeProducerDispatcher();
   rv->Init(data_pipe_);
   data_pipe_ = NULL;
   return scoped_refptr<Dispatcher>(rv.get());
 }
 
 }  // namespace system
 }  // namespace mojo