[ScreenOrientation] Add use counters.

It counts calls to screen.orientation and separately,
counts calls to its properties and methods.

BUG=162827

Review URL: https://codereview.chromium.org/625443004

git-svn-id: svn://svn.chromium.org/blink/trunk@183143 bbb929c8-8fbe-4397-9dbb-9b2b20218538