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

mojo/system/data_pipe_producer_dispatcher.h

 // 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.
 
 #ifndef MOJO_SYSTEM_DATA_PIPE_PRODUCER_DISPATCHER_H_
 #define MOJO_SYSTEM_DATA_PIPE_PRODUCER_DISPATCHER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "mojo/system/dispatcher.h"
 #include "mojo/system/system_impl_export.h"
 
 namespace mojo {
 namespace system {
 
 class DataPipe;
 
 // This is the |Dispatcher| implementation for the producer handle for data
 // pipes (created by the Mojo primitive |MojoCreateDataPipe()|). This class is
 // thread-safe.
 class MOJO_SYSTEM_IMPL_EXPORT DataPipeProducerDispatcher : public Dispatcher {
  public:
   DataPipeProducerDispatcher();
 
   // Must be called before any other methods.
   void Init(scoped_refptr<DataPipe> data_pipe);
 
+  virtual Type GetType() OVERRIDE;
+
  private:
   friend class base::RefCountedThreadSafe<DataPipeProducerDispatcher>;
   virtual ~DataPipeProducerDispatcher();
 
   // |Dispatcher| implementation/overrides:
   virtual void CancelAllWaitersNoLock() OVERRIDE;
   virtual MojoResult CloseImplNoLock() OVERRIDE;
   virtual MojoResult WriteDataImplNoLock(const void* elements,
                                          uint32_t* num_bytes,
                                          MojoWriteDataFlags flags) OVERRIDE;
@@ skipping 14 matching lines @@
   // Protected by |lock()|:
   scoped_refptr<DataPipe> data_pipe_;  // This will be null if closed.
 
   DISALLOW_COPY_AND_ASSIGN(DataPipeProducerDispatcher);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_DATA_PIPE_PRODUCER_DISPATCHER_H_