Rename TextMatchMarker::State to LayoutStatus

Adding "Layout" to the name since we also have MatchStatus, and change State to
Status for consistency (they're both enums). I'm also reordering the
layout_status_ member variable to be above rendered_rect_ since whether or not
rendered_rect_ is currently valid depends on layout_status_.

BUG=707867

Review-Url: https://codereview.chromium.org/2915193002
Cr-Commit-Position: refs/heads/master@{#476693}
2 files changed