Commits on Dec 22, 2017

1. Paint worklets: Add pref for blocking sleep to be enabled for wpt tests …

   In aa48a2c I added a timeout for paint
   worklet threads. However, the test was broken. The blocking sleep
   function that was implemented as part of that commit was guarded behind
   the `dom.worklet.blockingsleep.enabled` pref, and while I ran the
   wpt-tests with that pref enabled, the test runner for sure did not.
   I tried running the test _without_ the pref enabled, and the tests still
   pass. This is because even the reference in that reftest is that of
   a broken image background, and *both* the paintworklet thread timing out
   and `sleep()` not being in scope would render the same thing: a broken
   image, which compares equal to the reference.
   
   This patch makes sure that now the pref is enabled for wpt worklet
   tests, and that such we can distinguish an actual timeout (test pass)
   from an unexpected situation (when we should fail the test).

   

   yati-sagade committed Dec 22, 2017

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