Stop linking in the old Mojo EDK.

mojo/runner/host/host_unittests.cc

 // 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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_io_thread.h"
 #include "base/test/test_suite.h"
+#include "mojo/edk/embedder/embedder.h"
 #include "mojo/runner/host/child_process.h"
 #include "mojo/runner/host/switches.h"
 #include "mojo/runner/init.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
 
 int main(int argc, char** argv) {
   base::CommandLine::Init(argc, argv);
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   mojo::runner::WaitForDebuggerIfNecessary();
 
   if (command_line.HasSwitch(switches::kChildProcess)) {
     base::AtExitManager at_exit;
 
     return mojo::runner::ChildProcessMain();
   }
 
-  mojo::embedder::Init();
+  base::TestSuite test_suite(argc, argv);
 
-  base::TestSuite test_suite(argc, argv);
+  base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);
+  mojo::edk::Init(test_io_thread.task_runner());
+
   return base::LaunchUnitTests(
       argc, argv,
       base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
 }