EDK: mostly style fix: change TestIOThread::Mode to an enum class.

mojo/edk/system/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 contains tests that are shared between different implementations of
 // |DataPipeImpl|.
 
 #include "mojo/edk/system/data_pipe_impl.h"
 
 #include <stdint.h>
@@ skipping 206 matching lines @@
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(LocalDataPipeImplTestHelper);
 };
 
 // RemoteDataPipeImplTestHelper ------------------------------------------------
 
 // Base class for |Remote{Producer,Consumer}DataPipeImplTestHelper|.
 class RemoteDataPipeImplTestHelper : public DataPipeImplTestHelper {
  public:
   RemoteDataPipeImplTestHelper()
-      : io_thread_(mojo::test::TestIOThread::kAutoStart) {}
+      : io_thread_(mojo::test::TestIOThread::StartMode::AUTO) {}
   ~RemoteDataPipeImplTestHelper() override {}
 
   void SetUp() override {
     scoped_refptr<ChannelEndpoint> ep[2];
     message_pipes_[0] = MessagePipe::CreateLocalProxy(&ep[0]);
     message_pipes_[1] = MessagePipe::CreateLocalProxy(&ep[1]);
 
     io_thread_.PostTaskAndWait(
         FROM_HERE, base::Bind(&RemoteDataPipeImplTestHelper::SetUpOnIOThread,
                               base::Unretained(this), ep[0], ep[1]));
@@ skipping 2215 matching lines @@
   test::Sleep(10u);
 
   EXPECT_EQ(MOJO_RESULT_OK, this->ConsumerEndReadData(num_bytes));
 
   this->ConsumerClose();
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo