Creates BackgroundShell and uses it in test

components/web_view/test_runner/launcher.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.
 
 #include "components/web_view/test_runner/launcher.h"
 
 #include "base/bind.h"
+#include "base/i18n/icu_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "mojo/shell/standalone/context.h"
 #include "url/gurl.h"
 
 namespace web_view {
 
 int LaunchTestRunner(int argc, char** argv) {
   // We want the runner::Context to outlive the MessageLoop so that pipes are
   // all gracefully closed / error-out before we try to shut the Context down.
   mojo::shell::Context shell_context;
   {
     base::MessageLoop message_loop;
     base::FilePath shell_dir;
     PathService::Get(base::DIR_MODULE, &shell_dir);
+    CHECK(base::i18n::InitializeICU());
     shell_context.Init(shell_dir);
 
     message_loop.PostTask(FROM_HERE,
                           base::Bind(&mojo::shell::Context::Run,
                                      base::Unretained(&shell_context),
                                      GURL("mojo:web_view_test_runner")));
     message_loop.Run();
 
     // Must be called before |message_loop| is destroyed.
     shell_context.Shutdown();
   }
 
   return 0;
 }
 
 }  // namespace web_view