Resize extension action icons to 16x16 in material design

Resize extension action icons to 16x16 in material design

Shrink the 19x19 extension action icons to 16x16
in top chrome material design so they match the
size and alignment of the other icons in the toolbar.

BUG=546206
TEST=manual

Committed: https://crrev.com/60a14060edc30c719915991b6c02dfd33f335676
Cr-Commit-Position: refs/heads/master@{#360103}

[tdanderson, 2015-11-17 15:37:13]

tdanderson@chromium.org changed reviewers:
+ rdevlin.cronin@chromium.org

[tdanderson, 2015-11-17 15:37:13]

Hi Devlin, can you please take a look?

[Devlin, 2015-11-17 17:28:41]

lgtm as a temporary solution for MD.

[tdanderson, 2015-11-17 17:40:41]

The CQ bit was checked by tdanderson@chromium.org

[commit-bot: I haz the power, 2015-11-17 17:41:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1454753002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1454753002/1

[commit-bot: I haz the power, 2015-11-17 17:46:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-17 17:47:13]

Patchset 1 (id:??) landed as
https://crrev.com/60a14060edc30c719915991b6c02dfd33f335676
Cr-Commit-Position: refs/heads/master@{#360103}