Use GL_LINEAR scaling instead of GL_NEAREST.

Use GL_LINEAR scaling instead of GL_NEAREST.

Dramatically improves scaling quality.

BUG=351458
TEST=videos are noticeably sharper.

Committed: https://crrev.com/991bb31434938a71af3cbb3e080cfea6a0240009
Cr-Commit-Position: refs/heads/master@{#303545}

[DaleCurtis, 2014-11-08 00:08:57]

dalecurtis@chromium.org changed reviewers:
+ ananta@chromium.org

[ananta, 2014-11-10 22:20:43]

LGTM. This does not address the scaling issues with the videos being displayed
at a reduced size. That looks like an issue in the compositor where we fall back
to no antialiasing.

[DaleCurtis, 2014-11-10 22:24:49]

Agreed, that looks bad on all platforms. I'll clarify this on the bug. Thanks
for review!

[DaleCurtis, 2014-11-10 22:38:03]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2014-11-10 22:39:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/713603002/1

[commit-bot: I haz the power, 2014-11-11 00:08:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-11 00:09:28]

Patchset 1 (id:??) landed as
https://crrev.com/991bb31434938a71af3cbb3e080cfea6a0240009
Cr-Commit-Position: refs/heads/master@{#303545}