Prepare chrome to use the new Mojo EDK by default.

content/test/run_all_unittests.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 "base/bind.h"
+#include "base/command_line.h"
 #include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_io_thread.h"
 #include "content/app/mojo/mojo_init.h"
 #include "content/public/test/unittest_test_suite.h"
 #include "content/test/content_test_suite.h"
+#include "third_party/mojo/src/mojo/edk/test/scoped_ipc_support.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/jni_android.h"
 #include "base/test/test_file_util.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #endif
 
 int main(int argc, char** argv) {
 #if defined(OS_ANDROID)
   // Register JNI bindings for android.
   base::RegisterContentUriTestUtils(base::android::AttachCurrentThread());
 #endif
   content::UnitTestTestSuite test_suite(
       new content::ContentTestSuite(argc, argv));
 #if !defined(OS_IOS)
   content::InitializeMojo();
+  base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);

[yzshen1, 2015/12/10 17:52:25]

Is line 29 needed if we don't use-new-edk?

[jam, 2015/12/10 18:02:48]

no, but i figured no harm done in leaving it. as opposed to the line below which
has to only run for new-edk because of differences in how it destructs.

+  scoped_ptr<mojo::test::ScopedIPCSupport> ipc_support;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("use-new-edk")) {
+    ipc_support.reset(new mojo::test::ScopedIPCSupport(
+        test_io_thread.task_runner()));
+  }
 #endif
 
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&content::UnitTestTestSuite::Run,
                              base::Unretained(&test_suite)));
 }