Revert of [Contextual Search] Add new assets for promo.

Revert of [Contextual Search] Add new assets for promo. (patchset #1 id:1 of https://codereview.chromium.org/978063002/)

Reason for revert:
We are going to replace multiple PNGs with a single SVG.

Original issue's description:
> [Contextual Search] Add new assets for promo.
>
> BUG=441476
>
> Committed: https://crrev.com/a8e635214679c50b9010d925d083f8e54b13ba92
> Cr-Commit-Position: refs/heads/master@{#319287}

TBR=donnd@chromium.org,dtrainor@chromium.org,mathp@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=441476
Committed: https://crrev.com/3f74ac1831f229cf357c6ce687189a915991fa1f
Cr-Commit-Position: refs/heads/master@{#321832}

[pedro (no code reviews), 2015-03-23 19:20:23]

Created Revert of [Contextual Search] Add new assets for promo.

[commit-bot: I haz the power, 2015-03-23 19:21:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1030703002/1

[commit-bot: I haz the power, 2015-03-23 19:21:01]

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

[commit-bot: I haz the power, 2015-03-23 19:21:02]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[pedro (no code reviews), 2015-03-23 19:21:21]

Hey guys, we are going to replace those PNGs with a single SVG. Please take a
look at this CL.

[Mathieu, 2015-03-23 19:21:25]

lgtm

[pedro (no code reviews), 2015-03-23 19:37:18]

The CQ bit was checked by pedrosimonetti@chromium.org

[commit-bot: I haz the power, 2015-03-23 19:38:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1030703002/1

[commit-bot: I haz the power, 2015-03-23 19:39:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-23 19:40:01]

Patchset 1 (id:??) landed as
https://crrev.com/3f74ac1831f229cf357c6ce687189a915991fa1f
Cr-Commit-Position: refs/heads/master@{#321832}