cc: Remove GL_TEXTURE_2D hard-coding

cc: Remove GL_TEXTURE_2D hard-coding

Change a few instances of hard-coding GL_TEXTURE_2D in
VideoResourceUpdater to query the texture target from the resource, and
add a helper function to do this query this property. This is neccessary
now that the ResourceProvider decides the texture target to use on the
client's behalf.

BUG=533677
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/1cea3eccdb0bddbac4954ea456c3864f21c05b3a
Cr-Commit-Position: refs/heads/master@{#358231}

[ccameron, 2015-11-05 22:36:59]

ccameron@chromium.org changed reviewers:
+ reveman@chromium.org

[ccameron, 2015-11-05 22:37:00]

This is the chopped half of the other patch.

[reveman, 2015-11-05 23:07:30]

thanks lgtm

[ccameron, 2015-11-06 01:57:53]

The CQ bit was checked by ccameron@chromium.org

[commit-bot: I haz the power, 2015-11-06 01:58:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1406013007/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1406013007/20001

[commit-bot: I haz the power, 2015-11-06 02:04:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-06 02:05:25]

Patchset 2 (id:??) landed as
https://crrev.com/1cea3eccdb0bddbac4954ea456c3864f21c05b3a
Cr-Commit-Position: refs/heads/master@{#358231}