User Manager: fix text blurriness and "remove" button style

User Manager: fix text blurriness and "remove" button style

1. The text is blurry because we use a transform: scale3d(), which on non-retina 
desktop Chrome is blurry. I assume there is a reason why CrOS chose a scale3d()
so I only made this change for the desktop.
2. This leads to a webkit bug (crbug.com/406529) where transforms and opacity
transitions do not play well together, so I've removed the opacity transition on
the action-area-box. 

Also:
3. Fixed the focus style on the "remove user" button to not be the ugly blue 
default but match the gmail style.

BUG=399683, 403784
TEST=Start Chrome with -enable-new-avatar-menu. Click on "Switch person". 
The profile names in the user manager should not be blurry, and hovering
over the pods should not be janky.

Committed: https://crrev.com/0f76d30c42ca7c794562f64e642e1db4d405caa2
Cr-Commit-Position: refs/heads/master@{#291640}

[xiyuan, 2014-08-22 20:48:06]

lgtm

https://codereview.chromium.org/476193003/diff/20001/chrome/browser/resources...
File chrome/browser/resources/user_manager/user_manager.css (right):

https://codereview.chromium.org/476193003/diff/20001/chrome/browser/resources...
chrome/browser/resources/user_manager/user_manager.css:180: border: 1px solid
transparent !important;
nit: alpha sort the css rules.

[noms (inactive), 2014-08-23 19:08:11]

https://codereview.chromium.org/476193003/diff/20001/chrome/browser/resources...
File chrome/browser/resources/user_manager/user_manager.css (right):

https://codereview.chromium.org/476193003/diff/20001/chrome/browser/resources...
chrome/browser/resources/user_manager/user_manager.css:180: border: 1px solid
transparent !important;
On 2014/08/22 20:48:06, xiyuan wrote:
> nit: alpha sort the css rules.

Done.

[noms (inactive), 2014-08-23 19:08:16]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-08-23 19:09:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/476193003/40001

[commit-bot: I haz the power, 2014-08-23 19:59:22]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)

[commit-bot: I haz the power, 2014-08-23 20:45:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-23 20:45:43]

Try jobs failed on following builders:
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)

[noms (inactive), 2014-08-25 03:47:42]

The CQ bit was checked by noms@chromium.org

[commit-bot: I haz the power, 2014-08-25 03:48:34]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/noms@chromium.org/476193003/40001

[commit-bot: I haz the power, 2014-08-25 04:41:43]

Committed patchset #2 (40001) as b4d1de3e1e6949142035d1051b64ccfc12de0351

[commit-bot: I haz the power, 2014-09-10 02:33:03]

Patchset 2 (id:??) landed as
https://crrev.com/0f76d30c42ca7c794562f64e642e1db4d405caa2
Cr-Commit-Position: refs/heads/master@{#291640}