Pass command line args to apptests

mojo/public/cpp/application/lib/application_test_main.cc

Index: mojo/public/cpp/application/lib/application_test_main.cc
diff --git a/mojo/public/cpp/application/lib/application_test_main.cc b/mojo/public/cpp/application/lib/application_test_main.cc
index 6cdfb0d7fa53eab272d69fdd3967e28ce3a0a038..573a1d3114c01be6f826145f71a3963180bf9864 100644
--- a/mojo/public/cpp/application/lib/application_test_main.cc
+++ b/mojo/public/cpp/application/lib/application_test_main.cc
@@ -21,7 +21,8 @@ MojoResult MojoMain(MojoHandle shell_handle) {
 
     // Construct an ApplicationImpl just for the GTEST commandline arguments.
     // GTEST command line arguments are supported amid application arguments:
-    // $ mojo_shell 'mojo:example_apptests arg1 --gtest_filter=foo arg2'
+    // $ mojo_shell mojo:example_apptests \
+    //   --args-for='mojo:example_apptests arg1 --gtest_filter=foo arg2'
     mojo::ApplicationDelegate dummy_application_delegate;
     mojo::ApplicationImpl app(&dummy_application_delegate, shell_handle);
     MOJO_CHECK(app.WaitForInitialize());
@@ -40,6 +41,7 @@ MojoResult MojoMain(MojoHandle shell_handle) {
 
     testing::InitGoogleTest(&argc, const_cast<char**>(&(argv[0])));
     mojo::test::SetShellHandle(app.UnbindShell());
+    mojo::test::InitializeArgs(argc, argv);
   }
 
   int result = RUN_ALL_TESTS();