Update Media Router WebUI Icons.

Update Media Router WebUI Icons.

Update down-arrow-showing.png and add 2X version of it.

BUG=464222
Committed: https://crrev.com/4cbffeb3335fb08c27739b47d33b7ff17fee034d
Cr-Commit-Position: refs/heads/master@{#323907}

[apacible, 2015-04-02 22:51:23]

apacible@chromium.org changed reviewers:
+ jhawkins@chromium.org, mfoltz@chromium.org

[apacible, 2015-04-02 22:52:37]

PTAL, thanks!

[James Hawkins, 2015-04-02 23:12:48]

Where is this file referenced?

[apacible, 2015-04-02 23:18:32]

On 2015/04/02 23:12:48, James Hawkins wrote:
> Where is this file referenced?

One of our polymer elements (not sent out for review yet) shows one of three
icons, down-arrow.png, down-arrow-hover.png, and down-arrow-showing.png.

[James Hawkins, 2015-04-03 14:58:30]

lgtm

[mark a. foltz, 2015-04-03 21:04:45]

Are these icons right?  They look like up arrows in reitveld.

[apacible, 2015-04-03 21:30:21]

On 2015/04/03 21:04:45, mark a. foltz wrote:
> Are these icons right?  They look like up arrows in reitveld.

Oh, I should rename these. The -showing icons are up arrows, but they're all
used for the drop-down. I'll rename the relevant icons to drop-down-arrow-* for
consistency.

[apacible, 2015-04-03 22:10:15]

Updated icon names.

I'm not sure why reitveld is showing down-arrow-showing.png as "modified"
instead of "deleted".

[mark a. foltz, 2015-04-03 23:49:46]

lgtm

I couldn't see some of the renamed icons in reitveld, but I trust they are there
(and just not being rendered properly against a white background).

On 2015/04/03 22:10:15, apacible wrote:
> Updated icon names.
> 
> I'm not sure why reitveld is showing down-arrow-showing.png as "modified"
> instead of "deleted".

What does git diff report?

[apacible, 2015-04-04 00:58:06]

Thanks!

> What does git diff report?

"deleted
chrome/browser/resources/media_router/elements/icon/down-arrow-showing.png"

[apacible, 2015-04-06 15:03:31]

The CQ bit was checked by apacible@chromium.org

[apacible, 2015-04-06 15:03:32]

The patchset sent to the CQ was uploaded after l-g-t-m from
jhawkins@chromium.org
Link to the patchset: https://codereview.chromium.org/1055273002/#ps20001
(title: "Rename icons to drop-down-arrow-*")

[commit-bot: I haz the power, 2015-04-06 15:03:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1055273002/20001

[commit-bot: I haz the power, 2015-04-06 15:52:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-04-06 17:36:14]

Patchset 2 (id:??) landed as
https://crrev.com/4cbffeb3335fb08c27739b47d33b7ff17fee034d
Cr-Commit-Position: refs/heads/master@{#323907}