Close all writers before JingleSession is destroyed.

remoting/protocol/input_sender.h

Index: remoting/protocol/input_sender.h
diff --git a/remoting/protocol/input_sender.h b/remoting/protocol/input_sender.h
index db7bd6d02bb9369bc7976b38264e9102af18e6af..5abcb331bb5de446af1a1ab12a0b3c375125a7fa 100644
--- a/remoting/protocol/input_sender.h
+++ b/remoting/protocol/input_sender.h
@@ -28,6 +28,9 @@ namespace protocol {
 
 class BufferedSocketWriter;
 
+// Implementation of InputStub that sends messages on a socket. Must
+// be created and closed on the network thread, but can be used on any
+// other thread.
 class InputSender : public InputStub {
  public:
   // Create a stub using a socket.
@@ -38,6 +41,10 @@ class InputSender : public InputStub {
   virtual void InjectKeyEvent(const KeyEvent* event, Task* done);
   virtual void InjectMouseEvent(const MouseEvent* event, Task* done);
 
+  // Stop writing. Must be called on the network thread when the
+  // underlying socket is being destroyed.
+  void Close();
+
  private:
   // Helper method to run the task and delete it afterwards.
   void RunTask(Task* done);