commit 9fc7e65aadb5e61fbd0855212242018cba09d3a4
author Kent Tamura <tkent@chromium.org> Fri Jul 28 14:52:53 2017
committer Commit Bot <commit-bot@chromium.org> Fri Jul 28 14:52:53 2017
tree b2d99aa40fb85066e1bb027dad642c7313b32ddc
parent 10b3b05bc2916a9d3882c7d2db080a490d2d9369

macOS: Update UA stylesheet for buttons, and remove border-adjustment behavior for -webkit-appearance:button

This CL makes the default size of CSS-rendered buttons same as
buttons with -webkit-appearance:button/push-button.

* Before this CL
UA stylesheet:
  padding: 2px 6px 3px 6px;
  border-width: 2px;

Style adjustment for -webkit-appearance:push-button:
  padding: 2px 8px 3px 8px; (adjusted by blink::ThemeMac)
  border-width: 0; (adjusted by blink::Theme)

Style adjustment for -webkit-appearance:button:
  padding: 2px 6px 3px 6px; (no adjustment)
  border-width: 0 2px 0 2px; (adjusted by blink::ThemeMac)

So, push-button and button had same sizes, and CSS fallback buttons
were taller than them.

* After this CL:
UA stylesheet:
  padding: 1px 7px 2px 7px;
  border-width: 1px;

Style adjustment for -webkit-appearance:push-button:
  padding: 2px 8px 3px 8px; (adjusted by blink::ThemeMac)
  border-width: 0; (adjusted by blink::Theme)

Style adjustment for -webkit-appearance:button:
  padding: 1px 7px 2px 7px; (no adjustment)
  border-width: 1px; (no adjustment)

As for push-button and button, their size are not changed by this CL,
and the size of CSS fallback buttons matches to them.

In general, style adjustment by theme code should be reduced in order
to improve platform predictability.

This CL affects only macOS.

Bug: 546679
Change-Id: I4f10d546bf01851ff8ff1c6679bd4a1a56ea474a
Reviewed-on: https://chromium-review.googlesource.com/590392
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Keishi Hattori <keishi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490390}