Move fail on suspend logic from URLRequestJob to TcpClientSocket.

net/socket/stream_socket.h

Index: net/socket/stream_socket.h
diff --git a/net/socket/stream_socket.h b/net/socket/stream_socket.h
index cb979b63414114147f6f897f0f86900f8a817a5d..c7dbc8231b62d13f232eb16d001ed86e9e413c20 100644
--- a/net/socket/stream_socket.h
+++ b/net/socket/stream_socket.h
@@ -134,6 +134,19 @@ class NET_EXPORT_PRIVATE StreamSocket : public Socket {
   // |stats|. Default implementation does nothing.
   virtual void DumpMemoryStats(SocketMemoryStats* stats) const {}
 
+  // Sets whether the socket should treat entering suspend mode as an error, and
+  // return ERR_NETWORK_SUSPENDED if it happens. Defaults to false.
+  //
+  // This is useful because entering suspend mode tends to kill all sockets
+  // connected to remote systems.  See https://crbug.com/4606).
+  //
+  // This is a hint only, subclasses are free to ignore this flag (And currently
+  // do - it's only respected when set directly on a TcpClientSocket).
+  //
+  // TODO(mmenke):  Should this be done on all TCP sockets? On all non-localhost
+  // TCP sockets?
+  virtual void SetFailOnSuspend(bool disconnect_on_suspend);
+
  protected:
   // The following class is only used to gather statistics about the history of
   // a socket.  It is only instantiated and used in basic sockets, such as