The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/255379a40c015ed5a5003ff914c0cce5d0893001

commit 255379a40c015ed5a5003ff914c0cce5d0893001
Author: smcgruer <smcgruer@chromium.org>
Date: Sat Mar 18 01:01:39 2017

Code cleanup: remove unnecessary conditional guard in PaintLayerCompositor

We early-exit for CompositingUpdateNone on line 375, and the only change to
updateType after that is line 410 where it is at most increased. Therefore,
with the current code the updateType can't be none at line 417.

BUG= 702616 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2756903002
Cr-Commit-Position: refs/heads/master@{#457913}

[modify] https://crrev.com/255379a40c015ed5a5003ff914c0cce5d0893001/third_party/WebKit/Source/core/layout/compositing/PaintLayerCompositor.cpp