Bug 983910 - Set mParentListener for HttpChannelParent objects created after HTTP redirects r=jduell

netwerk/protocol/http/HttpChannelParent.cpp

@@ -588,6 +588,10 @@ HttpChannelParent::OnStartRequest(nsIRequest *aRequest, nsISupports *aContext)
   chan->GetCacheToken(getter_AddRefs(cacheEntry));
   mCacheEntry = do_QueryInterface(cacheEntry);
 
+  if (!mParentListener) {
+    mParentListener = chan->GetListener().downcast<HttpChannelParentListener>();
+    MOZ_ASSERT(mParentListener);
+  }
 
   nsCString secInfoSerialization;
   nsCOMPtr<nsISupports> secInfoSupp;

netwerk/protocol/http/nsHttpChannel.h

@@ -185,6 +185,10 @@ public: /* internal necko use only */
 
     void ForcePending(bool aForcePending);
 
+    already_AddRefed<nsIStreamListener> GetListener() {
+        return nsCOMPtr<nsIStreamListener>(mListener).forget();
+    }
+
 private:
     typedef nsresult (nsHttpChannel::*nsContinueRedirectionFunc)(nsresult result);