Bug 1400554 - Cancel a time in TLSFilterTransaction if transaction is canceled. r=mcmanus

--HG--
extra : amend_source : f5ede6ac54301e636e122bf6e2dc98057633b436

netwerk/protocol/http/TunnelUtils.cpp

@@ -126,6 +126,10 @@ TLSFilterTransaction::Close(nsresult aReason)
     return;
   }
 
+  if (mTimer) {
+    mTimer->Cancel();
+    mTimer = nullptr;
+  }
   mTransaction->Close(aReason);
   mTransaction = nullptr;
 }