Add mojo struct traits for GURL so that it can be sent over mojoms.

url/run_all_unittests.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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/at_exit.h"
 #include "base/bind.h"
+#include "base/message_loop/message_loop.h"
 #include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_io_thread.h"
 #include "base/test/test_suite.h"
 #include "build/build_config.h"
 #include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/test/scoped_ipc_support.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/jni_android.h"
 #include "base/test/test_file_util.h"
 #endif
 
 int main(int argc, char** argv) {
 #if defined(OS_ANDROID)
   JNIEnv* env = base::android::AttachCurrentThread();
   base::RegisterContentUriTestUtils(env);
 #endif
   base::TestSuite test_suite(argc, argv);
+
   mojo::edk::Init();
-  return base::LaunchUnitTestsSerially(
+  base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);
+  scoped_ptr<mojo::edk::test::ScopedIPCSupport> ipc_support;
+  ipc_support.reset(
+      new mojo::edk::test::ScopedIPCSupport(test_io_thread.task_runner()));
+
+  return base::LaunchUnitTests(
       argc, argv,
       base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
 }