Replace 0 with nullptr in some files in core/dom
This CL doesn't replace all. There are still files where 0 is used in core/dom.
Since I've found that replacing is a tedious task and error-prone, I'll try to write a
clang refactoring tool to replace others, not limited to core/dom, semi-automatically,
hopefully.
Change-Id: If2e673bfda1b099a1388586d6343955e98d6dcc7
Reviewed-on: https://chromium-review.googlesource.com/515002
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Hayato Ito <hayato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#474624}18 files changed
