Get service processes working on Mac and Linux.

chrome/service/service_process.cc

Index: chrome/service/service_process.cc
diff --git a/chrome/service/service_process.cc b/chrome/service/service_process.cc
index c521e3290a0f274eb8ef6676735bb166db05aa6d..4183faeeab7552ad3376ceecf24ed48eaab31e2a 100644
--- a/chrome/service/service_process.cc
+++ b/chrome/service/service_process.cc
@@ -141,8 +141,11 @@ bool ServiceProcess::Initialize(MessageLoop* message_loop,
 
   // After the IPC server has started we signal that the service process is
   // ready.
-  ServiceProcessState::GetInstance()->SignalReady(
-      NewRunnableMethod(this, &ServiceProcess::Shutdown));
+  if (!ServiceProcessState::GetInstance()->SignalReady(
+          io_thread_->message_loop(),
+          NewRunnableMethod(this, &ServiceProcess::Shutdown))) {
+    return false;
+  }
 
   // See if we need to stay running.
   ScheduleShutdownCheck();