Add --enable-websocket-over-spdy command-line flag

net/websockets/websocket_job.h

Index: net/websockets/websocket_job.h
diff --git a/net/websockets/websocket_job.h b/net/websockets/websocket_job.h
index f1dcdc8052f49b6039b1340e42cee675c59f984b..1584fd670dee24e39c8992bf4b513466d562c25d 100644
--- a/net/websockets/websocket_job.h
+++ b/net/websockets/websocket_job.h
@@ -46,6 +46,10 @@ class NET_API WebSocketJob
 
   static void EnsureInit();
 
+  // Enable or Disable WebSocket over SPDY feature.
+  // This function is intended to be called before I/O thread starts.
+  static void set_websocket_over_spdy_enabled(bool enabled);
+
   State state() const { return state_; }
   virtual void Connect();
   virtual bool SendData(const char* data, int len);
@@ -94,6 +98,8 @@ class NET_API WebSocketJob
 
   void SendPending();
 
+  static bool websocket_over_spdy_enabled_;
+
   SocketStream::Delegate* delegate_;
   State state_;
   bool waiting_;