Bug 1423482 - ChannelMediaResource::CacheClientNotifyDataReceived() should use mCallback->AbstractMainThread() to dispatch tasks. r=bechen

To be consistent with other functions.

MozReview-Commit-ID: 1adZkXx2VkB

--HG--
extra : rebase_source : b7c420c717ffc95feb73749305fd25e3bba12ae1
extra : intermediate-source : a7a9f6ae0a0291c76f2eee0e89f57684df98a061
extra : source : 9055561c3203e06c0e2d6d0daaa76f3e85dc1b2c

dom/media/ChannelMediaResource.cpp

@@ -773,8 +773,7 @@ ChannelMediaResource::RecreateChannel()
 void
 ChannelMediaResource::CacheClientNotifyDataReceived()
 {
-  SystemGroup::Dispatch(
-    TaskCategory::Other,
+  mCallback->AbstractMainThread()->Dispatch(
     NewRunnableMethod("MediaResourceCallback::NotifyDataArrived",
                       mCallback.get(),
                       &MediaResourceCallback::NotifyDataArrived));