Add UMA for navigator.permissions.query() usage.
Add UMA for navigator.permissions.query() usage.

Has to land after Blink CL: https://codereview.chromium.org/1057193003/

BUG=474692
TBR=mlamouri@chromium.org

Review URL: https://codereview.chromium.org/1059563005

Cr-Commit-Position: refs/heads/master@{#324166}
(cherry picked from commit 98f35c271aa2448a8e17761a308e2158be1dda6b)

Review URL: https://codereview.chromium.org/1078173005

Cr-Commit-Position: fe94940391158563b8e4cf7888f93321f554af93@{#64}
Cr-Branched-From: 9fdd9ec11ee753dedeffe15e7e822b13445dc287@{#323860}

fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk