NS_DispatchToMainThread, NS_ReleaseOnMainThread and MutableBlobStreamListener are used in dom/fetch: http://searchfox.org/mozilla-central/search?q=Dispatch%7CAsyncWait%7CTimer%7CAbstractThread%7CProxyRelease%7CReleaseOnMainThread%7CMutableBlobStreamListener&case=false&regexp=true&path=dom%2Ffetch The idea to support labeling in dom/fetch is to hold an nsIEventTarget at FetchRequest() either from 1. nsIGlobalObject::EventTargetFor() if NS_IsMainThread() is true, or 2. WorkerPrivate::MainThreadEventTarget(), otherwise, for the runnables to be dispatched later. File this bug for the tracking in dom/fetch.

The use of NS_NewInputStreamPump() requires nsIEventTarget for labeling runnables dispatched internally after bug 1352176 is landed: http://searchfox.org/mozilla-central/rev/d66b9f27d5630a90b2fce4d70d4e9050f43df9b4/dom/fetch/Fetch.cpp#1261

Treeherder result looks fine: https://treeherder.mozilla.org/#/jobs?repo=try&revision=8c454fcd114f585eb7b2d25fddfaf125ced5b3b2

Comment on attachment 8868368 [details] [diff] [review] (v1) Part 3: Label FetchDriver. Review of attachment 8868368 [details] [diff] [review]: ----------------------------------------------------------------- ::: dom/fetch/Fetch.cpp @@ +280,5 @@ > NS_WARNING("Aborting Fetch because worker already shut down"); > return NS_OK; > } > > + WorkerPrivate* worker = proxy->GetWorkerPrivate(); call it workerPrivate

Pushed by btseng@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/d343ee1e22d2 Part 1: Label FetchSignalProxy. r=baku https://hg.mozilla.org/integration/mozilla-inbound/rev/5e90e289c6f6 Part 2: Label FetchBody. r=baku https://hg.mozilla.org/integration/mozilla-inbound/rev/8cc412eac382 Part 3: Label FetchDriver. r=baku

https://hg.mozilla.org/mozilla-central/rev/d343ee1e22d2 https://hg.mozilla.org/mozilla-central/rev/5e90e289c6f6 https://hg.mozilla.org/mozilla-central/rev/8cc412eac382