[mojo-edk] Stop using the sync broker on OS X

mojo/edk/system/node_controller.cc

Index: mojo/edk/system/node_controller.cc
diff --git a/mojo/edk/system/node_controller.cc b/mojo/edk/system/node_controller.cc
index 1472f03fd5a161e867f45409b6fe32b0a23e60e4..45079413fec275ee12f8e171c34931c9da96c665 100644
--- a/mojo/edk/system/node_controller.cc
+++ b/mojo/edk/system/node_controller.cc
@@ -127,7 +127,7 @@ void NodeController::ConnectToChild(base::ProcessHandle process_handle,
 
 void NodeController::ConnectToParent(ScopedPlatformHandle platform_handle) {
 // TODO(amistry): Consider the need for a broker on Windows.
-#if defined(OS_POSIX)
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
   // On posix, use the bootstrap channel for the broker and receive the node's
   // channel synchronously as the first message from the broker.
   broker_.reset(new Broker(std::move(platform_handle)));
@@ -245,7 +245,7 @@ void NodeController::ConnectToChildOnIOThread(
     ScopedPlatformHandle platform_handle) {
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
 
-#if defined(OS_POSIX)
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
   PlatformChannelPair node_channel;
   // BrokerHost owns itself.
   BrokerHost* broker_host = new BrokerHost(std::move(platform_handle));