Create MetroViewerProcessHost as a common base for TestMetroViewerProcessHost and ChromeMetroViewer…

ash/test/ash_test_base.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 "ash/test/ash_test_base.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 101 matching lines @@
   Shell::GetPrimaryRootWindow()->ShowRootWindow();
   // Move the mouse cursor to far away so that native events doesn't
   // interfere test expectations.
   Shell::GetPrimaryRootWindow()->MoveCursorTo(gfx::Point(-1000, -1000));
   ash::Shell::GetInstance()->cursor_manager()->EnableMouseEvents();
 
 #if defined(OS_WIN)
   if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
       !CommandLine::ForCurrentProcess()->HasSwitch(
           ash::switches::kForceAshToDesktop)) {
-    metro_viewer_host_.reset(new TestMetroViewerProcessHost("viewer"));
+    ipc_thread_.reset(new base::Thread("test_metro_viewer_ipc_thread"));
+    base::Thread::Options options;
+    options.message_loop_type = base::MessageLoop::TYPE_IO;
+    ipc_thread_->StartWithOptions(options);
+
+    metro_viewer_host_.reset(
+        new TestMetroViewerProcessHost("viewer",
+                                       ipc_thread_->message_loop_proxy()));
     CHECK(metro_viewer_host_->LaunchViewerAndWaitForConnection(
         win8::test::kDefaultTestAppUserModelId));
     aura::RemoteRootWindowHostWin* root_window_host =
         aura::RemoteRootWindowHostWin::Instance();
     CHECK(root_window_host != NULL);
   }
 #endif
 }
 
 void AshTestBase::TearDown() {
@@ skipping 123 matching lines @@
       SetHasActiveUser(user_logged_in);
 }
 
 void AshTestBase::SetCanLockScreen(bool can_lock_screen) {
   ash_test_helper_->test_shell_delegate()->test_session_state_delegate()->
       SetCanLockScreen(can_lock_screen);
 }
 
 }  // namespace test
 }  // namespace ash