Revert r59012 which started using Chrome sockets for sync.

chrome/browser/sync/profile_sync_service.cc

Index: chrome/browser/sync/profile_sync_service.cc
diff --git a/chrome/browser/sync/profile_sync_service.cc b/chrome/browser/sync/profile_sync_service.cc
index c352dce9842ee6df4d660362cbfd5d6ca4beae3f..2cf676e844658c064ed7acb8f461e951f433c406 100644
--- a/chrome/browser/sync/profile_sync_service.cc
+++ b/chrome/browser/sync/profile_sync_service.cc
@@ -278,6 +278,12 @@ void ProfileSyncService::InitSettings() {
         << " for test sync notification server.";
   }
 
+  notifier_options_.use_chrome_async_socket =
+      !command_line.HasSwitch(switches::kSyncDisableChromeAsyncSocket);
+  if (notifier_options_.use_chrome_async_socket) {
+    LOG(INFO) << "Using ChromeAsyncSocket";
+  }
+
   notifier_options_.try_ssltcp_first =
       command_line.HasSwitch(switches::kSyncUseSslTcp);
   if (notifier_options_.try_ssltcp_first) {