Make Dispatcher::Type an enum class.

mojo/edk/system/remote_data_pipe_impl_unittest.cc

 // Copyright 2015 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 tests both |RemoteProducerDataPipeImpl| and
 // |RemoteConsumerDataPipeImpl|.
 
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 208 matching lines @@
             message_pipe(1)->ReadMessage(
                 0, UserPointer<void>(read_buffer),
                 MakeUserPointer(&read_buffer_size), &read_dispatchers,
                 &read_num_dispatchers, MOJO_READ_MESSAGE_FLAG_NONE));
   EXPECT_EQ(0u, static_cast<size_t>(read_buffer_size));
   EXPECT_EQ(1u, read_dispatchers.size());
   EXPECT_EQ(1u, read_num_dispatchers);
   ASSERT_TRUE(read_dispatchers[0]);
   EXPECT_TRUE(read_dispatchers[0]->HasOneRef());
 
-  EXPECT_EQ(Dispatcher::kTypeDataPipeConsumer, read_dispatchers[0]->GetType());
+  EXPECT_EQ(Dispatcher::Type::DATA_PIPE_CONSUMER,
+            read_dispatchers[0]->GetType());
   consumer =
       static_cast<DataPipeConsumerDispatcher*>(read_dispatchers[0].get());
   read_dispatchers.clear();
 
   waiter.Init();
   hss = HandleSignalsState();
   MojoResult result =
       consumer->AddAwakable(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 456, &hss);
   if (result == MOJO_RESULT_OK) {
     context = 0;
@@ skipping 33 matching lines @@
   }
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfied_signals);
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_PEER_CLOSED, hss.satisfiable_signals);
 
   consumer->Close();
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo