EDK: mostly style fix: change TestIOThread::Mode to 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 19 matching lines @@
 namespace mojo {
 namespace system {
 namespace {
 
 const MojoHandleSignals kAllSignals = MOJO_HANDLE_SIGNAL_READABLE |
                                       MOJO_HANDLE_SIGNAL_WRITABLE |
                                       MOJO_HANDLE_SIGNAL_PEER_CLOSED;
 
 class RemoteDataPipeImplTest : public testing::Test {
  public:
-  RemoteDataPipeImplTest() : io_thread_(mojo::test::TestIOThread::kAutoStart) {}
+  RemoteDataPipeImplTest()
+      : io_thread_(mojo::test::TestIOThread::StartMode::AUTO) {}
   ~RemoteDataPipeImplTest() 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(&RemoteDataPipeImplTest::SetUpOnIOThread,
                               base::Unretained(this), ep[0], ep[1]));
@@ skipping 449 matching lines @@
   EXPECT_EQ(123456, elements[0]);
   EXPECT_EQ(789012, elements[1]);
   EXPECT_EQ(0, elements[2]);
 
   consumer->Close();
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo