commit 88bb958c59b218a5fe595ffe3ace9f11f21e28db
author kylechar <kylechar@chromium.org> Mon Apr 24 20:22:50 2017
committer Commit bot <commit-bot@chromium.org> Mon Apr 24 20:22:50 2017
tree fe3a390631fa41a9fceee6e302f7f1640d916359
parent deb6be8f732a157329490e49fbfd41826757a0fd

Reintroduce OffscreenCanvasSurfaceClient interface.

This interface got switched out for DisplayCompositorClient, which
became FrameSinkManagerClient, in http://crrev.com/2695603002.

The two interfaces were very similar, both having just
OnSurfaceCreated() but with different intentions. FrameSinkManagerClient
is intended for the single GPU to browser connection.
OffscreenCanvasSurfaceClient is intended for multiple browser to
renderer connections. This reintroduces OffscreenCanvasSurfaceClient for
clarity.

BUG=664547

Review-Url: https://codereview.chromium.org/2811193003
Cr-Commit-Position: refs/heads/master@{#466735}