GitLab

Having one LayerTreeFrameSink for every sub-surface
causes synchronizing problem between sub-surfaces, so
we decide to only have one LayerTreeFrameSink per
toplevel window.

Bug: 731742
Change-Id: I6f3e09c33f6f98aab281ce2fab032f9df29f1e7d
Reviewed-on: https://chromium-review.googlesource.com/552719
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486788}