Move ProxyConfigService construction onto the IO thread.

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 f820f938d6401a95a76f0692788265fd65ed5c82..4f510be5fcfff0866ffdf66bbab6440f4e8b405f 100644
--- a/chrome/service/service_process.cc
+++ b/chrome/service/service_process.cc
@@ -209,6 +209,8 @@ bool ServiceProcess::Initialize(MessageLoopForUI* message_loop,
 }
 
 bool ServiceProcess::Teardown() {
+  if (request_context_getter_.get())
+    request_context_getter_->StartTearDown();
   service_prefs_.reset();
   cloud_print_proxy_.reset();
 
@@ -218,6 +220,9 @@ bool ServiceProcess::Teardown() {
   shutdown_event_.Signal();
   io_thread_.reset();
   file_thread_.reset();
+  // The ServiceURLRequestContextGetter must be destroyed after the other
+  // threads so that its shutdown tasks have a chance to run.
+  request_context_getter_ = NULL;
   // The NetworkChangeNotifier must be destroyed after all other threads that
   // might use it have been shut down.
   network_change_notifier_.reset();