Surface Synchronization: Remove unnecessary LocalSurfaceId plumbing

LocalSurfaceId is plumbed to WebContents for auto-resize but never used.

This CL deletes that plumbing.

Bug: 672962
Change-Id: I851c17d856fc72405e5893ddbe80e36bc068af49
TBR: [email protected]
Reviewed-on: https://chromium-review.googlesource.com/1045911
Reviewed-by: Fady Samuel <[email protected]>
Commit-Queue: Fady Samuel <[email protected]>
Cr-Commit-Position: refs/heads/master@{#556336}
6 files changed