Cancel any outstanding host resolve when calling SOCKSClientSocket::Disconnec...

net/base/host_resolver.h

Index: net/base/host_resolver.h
===================================================================
--- net/base/host_resolver.h	(revision 35690)
+++ net/base/host_resolver.h	(working copy)
@@ -185,6 +185,10 @@
               CompletionCallback* callback,
               LoadLog* load_log);
 
+  // Cancels the in-progress request, if any. This prevents the callback
+  // from being invoked. Resolve() can be called again after cancelling.
+  void Cancel();
+
  private:
   // Callback for when the request to |resolver_| completes, so we dispatch
   // to the user's callback.