Remove all remaining traces of MessageLoopProxy.

chrome/browser/service_process/service_process_control.cc

Index: chrome/browser/service_process/service_process_control.cc
diff --git a/chrome/browser/service_process/service_process_control.cc b/chrome/browser/service_process/service_process_control.cc
index 99769c5e48cd33cb902c202f61b2e3589a9792a9..c1b7bd815e2213df7249b59e4af7777a618ec723 100644
--- a/chrome/browser/service_process/service_process_control.cc
+++ b/chrome/browser/service_process/service_process_control.cc
@@ -52,10 +52,8 @@ void ServiceProcessControl::ConnectInternal() {
   // TODO(hclam): Handle error connecting to channel.
   const IPC::ChannelHandle channel_id = GetServiceProcessChannel();
   SetChannel(IPC::ChannelProxy::Create(
-      channel_id,
-      IPC::Channel::MODE_NAMED_CLIENT,
-      this,
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get()));
+      channel_id, IPC::Channel::MODE_NAMED_CLIENT, this,
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO).get()));
 }
 
 void ServiceProcessControl::SetChannel(