Add use counter for insertAdjacentHTML

Adding measure for insertAdjacentHTML. The other two related interfaces
InsertAdjacentText and InsertAdjacentElement are already measured.

BUG=

Review URL: https://codereview.chromium.org/181783009

git-svn-id: svn://svn.chromium.org/blink/trunk@168117 bbb929c8-8fbe-4397-9dbb-9b2b20218538