Add UseCounter values for Prefixed{Window,Worker}URL.

Also add missing entries for HTMLAppletElement,
HTMLMediaElementSeekToFragmentStart, and
HTMLMediaElementSeekToFragmentEnd.

Corresponds to https://codereview.chromium.org/186673002/.

R=asvitkine@chromium.org
BUG=

Review URL: https://codereview.chromium.org/180743029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255604 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255604
[rAC, OSX] Fix Omnibox font issue

Omnibox text can lose text attributes when the origin chip becomes
invisible due to focus loss. This is due to side effects in
EmphasizeURLComponents, which essentially remove all text attributes
from the Omnibox when this routine is called during focus loss.

BUG=347316

Review URL: https://codereview.chromium.org/184783007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255605 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255605