Sync CharacterData and related interfaces with the spec

https://dom.spec.whatwg.org/#interface-characterdata
https://dom.spec.whatwg.org/#interface-comment
https://dom.spec.whatwg.org/#interface-processinginstruction
https://dom.spec.whatwg.org/#interface-text

This replaces |length| with |count| in a few places. The implementation
already uses |count| as the argument name.

BUG=460722

Review URL: https://codereview.chromium.org/946823002

git-svn-id: svn://svn.chromium.org/blink/trunk@190625 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed
tree: 7127e4dc0c4df9175e20ce548278fdc488f2b8b8
  1. third_party/