Introduce use counters for Blink specific CSS classes for editing

This patch introduces Blink specific CSS classes for editing for
  - Apple-interchange-newline
  - Apple-converted-space
  - Apple-paste-as-quotation
  - Apple-style-span
  - Apple-tab-span
These CSS classes are defined in "core/editing/HTMLInterchange.h"

We would like to deprecate these Blink specific CSS classes for browser
compatibility, if possible.

BUG=383677
TEST=n/a

Review URL: https://codereview.chromium.org/327323005

git-svn-id: svn://svn.chromium.org/blink/trunk@176171 bbb929c8-8fbe-4397-9dbb-9b2b20218538