Remove HttpTransactionWinHttp and the --winhttp command-line...

net/http/http_network_layer.h

Index: net/http/http_network_layer.h
===================================================================
--- net/http/http_network_layer.h	(revision 7967)
+++ net/http/http_network_layer.h	(working copy)
@@ -25,21 +25,12 @@
   // and allows other implementations to be substituted.
   static HttpTransactionFactory* CreateFactory(ProxyService* proxy_service);
 
-#if defined(OS_WIN)
-  // If value is true, then WinHTTP will be used.
-  static void UseWinHttp(bool value);
-#endif
-
   // HttpTransactionFactory methods:
   virtual HttpTransaction* CreateTransaction();
   virtual HttpCache* GetCache();
   virtual void Suspend(bool suspend);
 
  private:
-#if defined(OS_WIN)
-  static bool use_winhttp_;
-#endif
-
   // The proxy service being used for the session.
   ProxyService* proxy_service_;