Simplify parseHTMLAreaCoordinate
Simplify parseHTMLAreaCoordinate

Simplify parseHTMLAreaCoordinate by not using the "ok" parameter.
charactersToIntStrict is guaranteed to return 0 if an error occurred, i.e.
if ok would be false.

Review URL: https://codereview.chromium.org/1111513003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@194558 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk