Set ozone_platform_wayland to true for ozone/ChromeOS builds

ui/ozone/platform/wayland/fake_server.cc

 // Copyright 2016 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 "ui/ozone/platform/wayland/fake_server.h"
 
 #include <sys/socket.h>
 #include <wayland-server.h>
 #include <xdg-shell-unstable-v5-server-protocol.h>
 
@@ skipping 349 matching lines @@
     return false;
   if (!xdg_shell_.Initialize(display_.get()))
     return false;
 
   client_ = wl_client_create(display_.get(), server_fd.get());
   if (!client_)
     return false;
   (void)server_fd.release();
 
   base::Thread::Options options;
-  options.message_loop_type = MessageLoop::TYPE_IO;
+  options.message_loop_type = base::MessageLoop::TYPE_IO;
   if (!base::Thread::StartWithOptions(options))
     return false;
   task_runner()->PostTask(FROM_HERE,
                           base::Bind(&FakeServer::StartWatchingFileDescriptor,
                                      base::Unretained(this)));
 
   setenv("WAYLAND_SOCKET", base::UintToString(client_fd.release()).c_str(), 1);
 
   return true;
 }
@@ skipping 23 matching lines @@
                  base::Unretained(this)));
 }
 
 void FakeServer::OnFileCanReadWithoutBlocking() {
   wl_event_loop_dispatch(event_loop_, 0);
   wl_display_flush_clients(display_.get());
 }
 
 
 }  // namespace wl