Cleanup LayoutTextControl and its subclasses.

- Passes font family name via |const AtomicString&| instead of |AtomicString|.
- Constify getAvgCharWidth().

This CL doesn't change any behaviors.

BUG=

Review URL: https://codereview.chromium.org/1253543003

git-svn-id: svn://svn.chromium.org/blink/trunk@199420 bbb929c8-8fbe-4397-9dbb-9b2b20218538
6 files changed
tree: c0f98d46913c7a6e61bdf8c31903fbd0d17cdfce
  1. third_party/