Add the first app_shell_browsertest test.

apps/test/apps_tests_main.cc

Index: apps/test/apps_tests_main.cc
diff --git a/apps/test/apps_tests_main.cc b/apps/test/apps_tests_main.cc
deleted file mode 100644
index 080841e7aac5d31e1d114909d989640a185231ef..0000000000000000000000000000000000000000
--- a/apps/test/apps_tests_main.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// 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 <algorithm>
-
-#include "apps/test/apps_test_launcher_delegate.h"
-#include "base/sys_info.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-int main(int argc, char** argv) {
-  int default_jobs = std::max(1, base::SysInfo::NumberOfProcessors() / 2);
-  apps::AppsTestLauncherDelegate launcher_delegate;
-  return content::LaunchTests(&launcher_delegate, default_jobs, argc, argv);
-}