Update CSS to delay change in visibility so it matches the overlay

Update CSS to delay change in visibility so it matches the overlay

BUG=429652
Committed: https://crrev.com/46e4793edc7a72932bbbbe8e0ceadac08ff7372a
Cr-Commit-Position: refs/heads/master@{#302658}

[hcarmona, 2014-11-04 18:25:20]

hcarmona@chromium.org changed reviewers:
+ alekseys@chromium.org, dbeam@chromium.org

[hcarmona, 2014-11-04 18:27:41]

Change in CSS to fix regression from previous change to print preview. This
change will hide the overplayed elements with a 100ms delay which is the same
delay that the overlay has in being displayed. Without this delay the preview
area will be hidden even if there is a very short delay.

[Aleksey Shlyapnikov, 2014-11-04 18:46:20]

lgtm

[Dan Beam, 2014-11-04 19:15:13]

https://codereview.chromium.org/700463005/diff/1/chrome/browser/resources/pri...
File chrome/browser/resources/print_preview/previewarea/preview_area.css
(right):

https://codereview.chromium.org/700463005/diff/1/chrome/browser/resources/pri...
chrome/browser/resources/print_preview/previewarea/preview_area.css:89:
transition: visibility 100ms linear 100ms;
i'm amazed visibility is interpolated.
https://developer.mozilla.org/en-US/docs/Web/CSS/visibility#Interpolation

lgtm as long as this is cancelled when new previews finish loading/rendering.

[hcarmona, 2014-11-04 19:30:20]

The CQ bit was checked by hcarmona@chromium.org

[commit-bot: I haz the power, 2014-11-04 19:32:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/700463005/1

[commit-bot: I haz the power, 2014-11-04 20:41:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-04 20:42:05]

Patchset 1 (id:??) landed as
https://crrev.com/46e4793edc7a72932bbbbe8e0ceadac08ff7372a
Cr-Commit-Position: refs/heads/master@{#302658}