Fix document mode promo ImageView height.

Fix document mode promo ImageView height.

On certain small devices the height of the ImageView did not adjust
after the image got scaled. Set adjustViewBounds to true to start
adjusting the height.

BUG=514319
Committed: https://crrev.com/d2fe9d743717aa080b6fec31f4bf7d3beb8d9506
Cr-Commit-Position: refs/heads/master@{#340615}

[aurimas (slooooooooow), 2015-07-27 23:35:29]

aurimas@chromium.org changed reviewers:
+ newt@chromium.org

[aurimas (slooooooooow), 2015-07-27 23:35:29]

PTAL

[newt (away), 2015-07-27 23:38:48]

The CQ bit was checked by newt@chromium.org

[newt (away), 2015-07-27 23:38:48]

lgtm

[commit-bot: I haz the power, 2015-07-27 23:39:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1257243002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1257243002/1

[commit-bot: I haz the power, 2015-07-28 00:17:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-28 00:17:56]

Patchset 1 (id:??) landed as
https://crrev.com/d2fe9d743717aa080b6fec31f4bf7d3beb8d9506
Cr-Commit-Position: refs/heads/master@{#340615}