Stop linking in the old Mojo EDK.

ipc/mojo/run_all_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/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 "third_party/mojo/src/mojo/edk/embedder/embedder.h"
+#include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/embedder/platform_channel_pair.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::embedder::Init();
+  // Must be run before mojo::edk::Init.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("broker-handle")) {
+    mojo::edk::PreInitializeChildProcess();
+  }
+
+  base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);
+  mojo::edk::Init(test_io_thread.task_runner());
+
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("broker-handle")) {
+    std::string broker_handle_str =
+        base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+            "broker-handle");
+    mojo::edk::ScopedPlatformHandle broker_handle =
+        mojo::edk::PlatformChannelPair::
+            PassClientHandleFromParentProcessFromString(broker_handle_str);
+    mojo::edk::SetParentPipeHandle(std::move(broker_handle));
+  }
+
   return base::LaunchUnitTestsSerially(
       argc, argv,
       base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
 }