Context menu items are not proper when right click on Image in Extension.

Context menu items are not proper when right click on Image in Extension.

This is follow up change to add ITEM_GROUP_MEDIA_IMAGE so that we will
get proper context menu for Image also.

BUG=438091
Committed: https://crrev.com/d08566f23f1577fc63429345d88e362a8efe4b17
Cr-Commit-Position: refs/heads/master@{#306355}

[Deepak, 2014-12-02 05:28:31]

deepak.m1@samsung.com changed reviewers:
+ lazyboy@chromium.org

[Deepak, 2014-12-02 05:28:31]

This is followup changes for 372255 issue.
I am adding case for Image, so that we will get proper context menu while doing
right click on image.

PTAL at my changes.
Thanks

[Deepak, 2014-12-02 05:31:10]

deepak.m1@samsung.com changed reviewers:
+ yoz@chromium.org

[lazyboy, 2014-12-02 06:22:44]

lgtm

[Deepak, 2014-12-02 06:30:58]

The CQ bit was checked by deepak.m1@samsung.com

[commit-bot: I haz the power, 2014-12-02 06:31:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/774543003/1

[commit-bot: I haz the power, 2014-12-02 10:40:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-02 10:41:11]

Patchset 1 (id:??) landed as
https://crrev.com/d08566f23f1577fc63429345d88e362a8efe4b17
Cr-Commit-Position: refs/heads/master@{#306355}