commit 00a3908827f01ca5cd0bd911a7f12239975bee33
author bratell <bratell@opera.com> Thu Apr 06 11:34:45 2017
committer Commit bot <commit-bot@chromium.org> Thu Apr 06 11:34:45 2017
tree 56b62def7509a6eb31f045d223957f210a3f13fd
parent 0736e37b73d70fc56a93eeac32fff4a56c946c2d

Avoid duplicate functions/code in core/editing: kInvalidOffset

While experimenting with unity builds I encountered a few duplicate
symbols and functions in core/editing. This patch renames, moves
and unifies them.

kInvalidOffset is a name used both by PositionIterator and TextIterator.
This renames on of them kInvalidTextOffset to better match its use and
to avoid the name collision.

BUG=708949
R=yosin@chromium.org

Review-Url: https://codereview.chromium.org/2798283002
Cr-Commit-Position: refs/heads/master@{#462428}