beginnings of metro viewer process

ui/viewer/viewer_main.cc

+// Copyright (c) 2012 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 "base/command_line.h"
+#include "base/debug/debugger.h"
+#include "base/message_loop.h"
+#include "ui/compositor/test/compositor_test_support.h"
+#include "ui/viewer/viewer_process.h"
+
+// Mainline routine for running as the viewer process.
+int ViewerProcessMain() {
+  MessageLoop main_message_loop(MessageLoop::TYPE_UI);
+  ui::CompositorTestSupport::Initialize();
+
+  main_message_loop.set_thread_name("MainThread");
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+
+  VLOG(1) << "Viewer process launched: "
+          << CommandLine::ForCurrentProcess()->GetCommandLineString();
+
+  base::PlatformThread::SetName("CrViewerMain");
+
+  // TODO(scottmg): Uniquize this process?
+
+  ViewerProcess viewer_process;
+  if (viewer_process.Initialize(&main_message_loop, *command_line)) {
+    MessageLoopForUI::current()->Run();
+  } else {
+    LOG(ERROR) << "Viewer process failed to initialize";
+  }
+  viewer_process.Teardown();
+  return 0;
+}