Merge "Add more UseCounters for -webkit-appearance:button and -webkit-appearance:textfield." to M53.

Merge "Add more UseCounters for -webkit-appearance:button and -webkit-appearance:textfield." to M53.

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}
(cherry picked from commit 7b592f6c3a2c7a8caa92412b72192ddacee01341)

Committed: https://chromium.googlesource.com/chromium/src/+/f262617ee9532463277cac7a39d4b30af6b164e1

[tkent, 2016-07-28 04:21:00]

Description was changed from

==========
Merge "Add more UseCounters for -webkit-appearance:button and
-webkit-appearance:textfield." to M53.

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}
(cherry picked from commit 7b592f6c3a2c7a8caa92412b72192ddacee01341)
==========

to

==========
Merge "Add more UseCounters for -webkit-appearance:button and
-webkit-appearance:textfield." to M53.

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}
(cherry picked from commit 7b592f6c3a2c7a8caa92412b72192ddacee01341)

Committed:
https://chromium.googlesource.com/chromium/src/+/f262617ee9532463277cac7a39d4...
==========

[tkent, 2016-07-28 04:21:02]

Committed patchset #1 (id:1) manually as
f262617ee9532463277cac7a39d4b30af6b164e1.