Bug 1369044 - Change assertion to handle call failure r=michal

MozReview-Commit-ID: KqOfHSNwqEQ

--HG--
extra : rebase_source : eac98ee16b4dd94b32bed7d87f640cafeec3e7fc

netwerk/protocol/http/AltDataOutputStreamParent.cpp

@@ -39,7 +39,7 @@ AltDataOutputStreamParent::RecvWriteData(const nsCString& data)
   uint32_t n;
   if (mOutputStream) {
     rv = mOutputStream->Write(data.BeginReading(), data.Length(), &n);
-    MOZ_ASSERT(n == data.Length());
+    MOZ_ASSERT(n == data.Length() || NS_FAILED(rv));
     if (NS_FAILED(rv) && mIPCOpen) {
       Unused << SendError(rv);
     }