Mus-WS / Aura-Mus: Propagate LocalSurfaceId on WindowTreeHost creation
This CL optionally propagates the current cc::LocalSurfaceId associated
with a ServerWindow up to the WindowTreeHost embedded within it. When
surface synchronization is turned on, the WindowTreeHost will submit
CompositorFrames to that cc::LocalSurfaceId.
This CL makes no functional changes other than propagation of the
current cc::LocalSurfaceId on:
1. WindowTree::OnEmbed
2. WindowTree::OnTopLevelCreated
3. WindowManager::WmNewDisplayAdded
It is valid for a client to be embedded before a window has been given a
size and so the cc::LocalSurfaceId is passed around optionally.
BUG=672962
Review-Url: https://codereview.chromium.org/2778363002
Cr-Commit-Position: refs/heads/master@{#460271}
12 files changed
