Revert of Add compressed texture capabilities for GPU devices

Revert of Add compressed texture capabilities for GPU devices (https://codereview.chromium.org/292323003/)

Reason for revert:
RunDecodingTests failing on multiple platforms.  Please use trybots to validate and re-land.

Original issue's description:
> Add compressed texture capabilities for GPU devices
> 
> BUG=skia:
> 
> Committed: http://code.google.com/p/skia/source/detail?r=14880
> 
> Committed: http://code.google.com/p/skia/source/detail?r=14901

TBR=bsalomon@google.com,robertphillips@google.com,krajcevski@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: http://code.google.com/p/skia/source/detail?r=14902

[epoger, 2014-05-27 19:06:26]

Created Revert of Add compressed texture capabilities for GPU devices

[commit-bot: I haz the power, 2014-05-27 19:06:58]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/epoger@google.com/307543002/1

[commit-bot: I haz the power, 2014-05-27 19:07:13]

Change committed as 14902

[epoger, 2014-05-27 19:24:27]

A revert of this CL has been created in
https://codereview.chromium.org/302553008/ by epoger@google.com.

The reason for reverting is: Re-landing the original CL, because the revert
didn't fix things.  See http://skbug.com/2608 ('RunDecodingTests failing on
multiple platforms').