commit 06083fbf5d49b0dce17d6b86cb82b79dd3305005
author Darren Shen <shend@chromium.org> Tue Jun 27 23:58:26 2017
committer Commit Bot <commit-bot@chromium.org> Wed Jun 28 07:29:26 2017
tree e56d17b1a8ddb19b1aeef8ea6158d5943f1bc07e
parent 4138b3b838cb7a25191cc32272c2fbd14e861190

Change non-null pointers to refs and sprinkle DCHECKS in ComputedStyle.

This patch changes pointers that cannot be null to references. It also
adds DCHECKS to callers when they dereference a non-null pointer.

Bug: 628043
Change-Id: Ia48bb9057ef4ab6dbeef37f9981eb7fbd0fe4e2b
Reviewed-on: https://chromium-review.googlesource.com/551116
Reviewed-by: Bugs Nash <bugsnash@chromium.org>
Reviewed-by: meade_UTC10 <meade@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#482913}