commit 7b592f6c3a2c7a8caa92412b72192ddacee01341
author tkent <tkent@chromium.org> Wed Jul 27 03:25:50 2016
committer Commit bot <commit-bot@chromium.org> Wed Jul 27 03:29:48 2016
tree 53739e9cd992e1d3b4a7563d613f55403dd4b77c
parent b01ef6ae6f781753a82e0d2857aaed43323bceae

Add more UseCounters for -webkit-appearance:button and -webkit-appearance:textfield.

We found
 - |button| and |textfield| were frequently used in 'CSS reset'
 - there were some instances of <a> with -webkit-appearance:button

We'd like to know how frequently they affect actual rendering.

This CL adds the following counters:
 * -webkit-appearance:button is actually rendered
 * -webkit-appearance:button for elements with button appearance by default
 * -webkit-appearance:button for <a>
 * -webkit-appearance:button for element with push-button appearance by default
 * -webkit-appearance:textfield is actually rendered
 * -webkit-appearance:textfield for elements with textfield appearance by default
 * -webkit-appearance:textfield for <input type=search>

BUG=631849

Review-Url: https://codereview.chromium.org/2177283008
Cr-Commit-Position: refs/heads/master@{#408033}