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

mojo/edk/system/remote_message_pipe_unittest.cc

 // Copyright 2014 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 <stdint.h>
 #include <stdio.h>
 #include <string.h>
 
 #include <memory>
 #include <vector>
@@ skipping 27 matching lines @@
 namespace mojo {
 namespace system {
 namespace {
 
 const MojoHandleSignals kAllSignals = MOJO_HANDLE_SIGNAL_READABLE |
                                       MOJO_HANDLE_SIGNAL_WRITABLE |
                                       MOJO_HANDLE_SIGNAL_PEER_CLOSED;
 
 class RemoteMessagePipeTest : public testing::Test {
  public:
-  RemoteMessagePipeTest() : io_thread_(mojo::test::TestIOThread::kAutoStart) {}
+  RemoteMessagePipeTest()
+      : io_thread_(mojo::test::TestIOThread::StartMode::AUTO) {}
   ~RemoteMessagePipeTest() override {}
 
   void SetUp() override {
     io_thread_.PostTaskAndWait(
         FROM_HERE, base::Bind(&RemoteMessagePipeTest::SetUpOnIOThread,
                               base::Unretained(this)));
   }
 
   void TearDown() override {
     io_thread_.PostTaskAndWait(
@@ skipping 1293 matching lines @@
   mp0->Close(0);
   mp1->Close(1);
   EXPECT_EQ(MOJO_RESULT_OK, dispatcher->Close());
   // Note that |local_mp|'s port 0 belong to |dispatcher|, which was closed.
   local_mp->Close(1);
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo