Alan, I noticed that the side nav menu items are 
also 40px. Would you like those changed to 44px?

The tabs in the certificate manager are another 40px high
thing that you may want 44px? WDYT

Here's what it looks like with 44px menu spacing.

Deleted: Screenshot from 2016-05-24 18:35:50.png 63.3 KB

	Screenshot from 2016-05-24 18:35:50.png 63.3 KB View Download

(I rather like the 40px spacing on the side nav menu items).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3204336053295d134ab7844403393b23cae1f057

commit 3204336053295d134ab7844403393b23cae1f057
Author: dschuyler <dschuyler@chromium.org>
Date: Thu May 26 21:26:59 2016

[MD settings] move root css vars; increase checkbox and h2 row-height

This CL moves the :root css vars from settings_shared_css.html into a
separate file that is imported in settings.html. This more clearly
reflects the scope of :root vars. A height var is then used for the
checkbox, radio button and h2 style.

BUG= 614476 
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2009783003
Cr-Commit-Position: refs/heads/master@{#396285}

[modify] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/controls/settings_checkbox.html
[modify] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/settings.html
[modify] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/settings_dialog.html
[modify] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/settings_resources.grd
[add] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/settings_root_css.html
[modify] https://crrev.com/3204336053295d134ab7844403393b23cae1f057/chrome/browser/resources/settings/settings_shared_css.html

Side nav and tabbing heights should stay the same. Screenshot in #5 LGTM.