The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/70d144ce1f916439e83cf997daed5b896f494cce

commit 70d144ce1f916439e83cf997daed5b896f494cce
Author: Peng Huang <penghuang@google.com>
Date: Wed Sep 13 22:44:52 2017

Exo: make sure wl_surface_frame callback will be called.

In some case, the begin frame can arrive just before
DidReceivedCompositorFrameAck(), so the active_frame_callbacks_ is
empty, but the frame callback is still in frame_callbacks_. To make
sure frame callbacks will be called, we need receive more begine
frame. This CL fixes the issue by requesting more begin frames when
frame_callbacks_ is not empty.

Bug:  764815 
Change-Id: I9750b9c4bde6e84eba534bcc7f08c2d19bab9a21
Reviewed-on: https://chromium-review.googlesource.com/665543
Reviewed-by: David Reveman <reveman@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501776}
[modify] https://crrev.com/70d144ce1f916439e83cf997daed5b896f494cce/components/exo/surface_tree_host.cc