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[wip] Automerge works + only-unmerge left #9643

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iskakaushik
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Kaushik Iska added 11 commits June 21, 2019 16:30
This introduces a notion of a "owning" and "subsumed" queue ids.
Owning queue will take care of the tasks submitted to both that and it's
subsumed queue.

- The tasks submitted still maintain the queue affinity
- Same for the task observers

- Also adds MergedQueuesRunner which grabs both the locks owner
  and subsumed queues in RAII fashion.
- External view embedded after paint knows if it needs to
  be re-drawn.

- We use this information to determine whether we want to merge
  the platform and GPU threads.

- Rasterizer uses the raster status to resubmit the layer tree
  to be redrawn.
@iskakaushik iskakaushik closed this Jul 3, 2019
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