commit f5077ffe4f7a3d8c053e8bd8b2070bc699ca937f
author eseckler <eseckler@chromium.org> Thu Jan 19 10:13:30 2017
committer Commit bot <commit-bot@chromium.org> Thu Jan 19 10:13:30 2017
tree 1ba1d4a9308d2858e454656f57ffb9bc1587a465
parent ecb7bd1cd2294ead17cb71265c98a9574dd5f342

[headless] Fix screenshots with gpu enabled.

Turns out this is due to two things:
1) We were overriding ShouldCreateCompositorFrameSink in the browser
   compositor to always return false (which is unnecessary).
2) Contrary to what GpuBrowserCompositorOutputSurface and
   SoftwareBrowserCompositorOutputSurface do, the
   OffscreenBrowserCompositorOutputSurface wasn't letting the RWHI know
   about swapped frames.

This fixes both issues.

BUG=681614

Review-Url: https://codereview.chromium.org/2631263003
Cr-Commit-Position: refs/heads/master@{#444694}