The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/35927811f7b1d449675cbad2de6952844a93ef3e

commit 35927811f7b1d449675cbad2de6952844a93ef3e
Author: fsamuel <fsamuel@chromium.org>
Date: Wed Apr 12 19:59:49 2017

Surface synchronization: Immediately activate late arriving CompositorFrames

A dependent CompositorFrame may arrive late (after the deadline has hit and the
parent CompositorFrame activated). This CL tracks late arrivals (until the next
deadline hits) and immediately activates them despite dependencies.

This reduces latency and guttering of browser UI in Mus+Ash because this
prevents browser UI from blocking for too long on the renderer.

BUG= 672962 ,  710517 
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2814633006
Cr-Commit-Position: refs/heads/master@{#464122}

[modify] https://crrev.com/35927811f7b1d449675cbad2de6952844a93ef3e/cc/surfaces/compositor_frame_sink_support_unittest.cc
[modify] https://crrev.com/35927811f7b1d449675cbad2de6952844a93ef3e/cc/surfaces/surface_dependency_tracker.cc
[modify] https://crrev.com/35927811f7b1d449675cbad2de6952844a93ef3e/cc/surfaces/surface_dependency_tracker.h