Surface Synchronization: Disable CompositorImplLowEndBrowserTest test

This test is no longer valid once surface synchronization is on.

Bug: 855533
Change-Id: If8feae783911501b7962183b367b0c69d8371e62
Reviewed-on: https://chromium-review.googlesource.com/1141110
Commit-Queue: Fady Samuel <fsamuel@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575835}
2 files changed