Make nsIChannel implementations follow the rules that prevent them from leaking due to cycles with their notification callbacks. b=303043 r=biesi sr=darin

git-svn-id: svn://10.0.0.236/trunk@177663 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/content/html/document/src/nsWyciwygChannel.cpp

@@ -503,6 +503,11 @@ nsWyciwygChannel::OnStopRequest(nsIRequest *request, nsISupports *ctx, nsresult
   CloseCacheEntry(mStatus);
   mPump = 0;
   mIsPending = PR_FALSE;
+
+  // Drop notification callbacks to prevent cycles.
+  mCallbacks = 0;
+  mProgressSink = 0;
+
   return NS_OK;
 }