The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5a213ac08a1ea69d04c2fc9e4f21fe53c109ff52

commit 5a213ac08a1ea69d04c2fc9e4f21fe53c109ff52
Author: pdr <pdr@chromium.org>
Date: Wed Jan 11 19:16:13 2017

Move "prePaint" under the "Update Layer Tree" devtools timeline step

Slimming paint invalidation (--enable-slimming-paint-invalidation) moves
paint invalidation to a new "pre-paint" document lifecycle stage. This
patch moves prePaint under the "Update Layer Tree" timeline category, and
adds a comment to move this under "Paint" for slimming paint v2 (see
discussion in https://codereview.chromium.org/2623613008).

BUG=679403

Review-Url: https://codereview.chromium.org/2622983002
Cr-Commit-Position: refs/heads/master@{#442975}

[modify] https://crrev.com/5a213ac08a1ea69d04c2fc9e4f21fe53c109ff52/third_party/WebKit/Source/core/frame/FrameView.cpp

Going to leave this assigned because we still need to move PrePaint under "Paint" for slimming paint v2.

Moving to P2. We're trying to only mark bugs that we expect to fix within 30 days as P1, and that we can assign a target release to. This doesn't seem to fit that situation.

Revise if you feel otherwise.