Removed use of XmppSocketAdapter by sync.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 49626630c47c6cb90ce344843e9c944ffa3b1641..9d38d74b9969294ee4c19e61caf12a0df683076e 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -988,11 +988,6 @@ const char kStartMaximized[]                = "start-maximized";
 // Control Sync XMPP client settings.
 const char kSyncAllowPlain[]                = "allow-plain";
 
-// Disable the Chrome-socket-based buzz::AsyncSocket implementation
-// for sync notifications, instead using libjingle sockets.
-const char kSyncDisableChromeAsyncSocket[]  =
-    "sync-disable-chrome-async-socket";
-
 // Control Sync XMPP client settings.
 const char kSyncDisableTls[]                = "disable-tls";