Plumb explicit IPC task runner through to IPC::Channel creation

ipc/ipc_perftest_support.cc

Index: ipc/ipc_perftest_support.cc
diff --git a/ipc/ipc_perftest_support.cc b/ipc/ipc_perftest_support.cc
index 2932ce838f307e2f635b4bbc4f29f0d13ed1b603..ec6f9d1776e2cbe6f93834538cea1922a75883d1 100644
--- a/ipc/ipc_perftest_support.cc
+++ b/ipc/ipc_perftest_support.cc
@@ -20,6 +20,7 @@
 #include "base/test/perf_time_logger.h"
 #include "base/test/test_io_thread.h"
 #include "base/threading/thread.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "ipc/ipc_channel.h"
@@ -335,8 +336,9 @@ PingPongTestClient::~PingPongTestClient() {
 }
 
 std::unique_ptr<Channel> PingPongTestClient::CreateChannel(Listener* listener) {
-  return Channel::CreateClient(IPCTestBase::GetChannelName("PerformanceClient"),
-                               listener);
+  return Channel::CreateClient(
+      IPCTestBase::GetChannelName("PerformanceClient"), listener,
+      base::ThreadTaskRunnerHandle::Get());
 }
 
 int PingPongTestClient::RunMain() {