Revert of GrResourceCache2 manages scratch texture.

Revert of GrResourceCache2 manages scratch texture. (patchset #14 id:260001 of https://codereview.chromium.org/608883003/)

Reason for revert:
Turning bots red:
Nanobench seems to be uniformly failing on Android
(http://108.170.220.21:10117/builders/Perf-Android-Venue8-PowerVR-x86-Release/builds/99/steps/RunNanobench/logs/stdio)

Ubuntu GTX660 32bit is failing in both Debug and Release on GM generation (it appears to be out of memory) (http://108.170.220.120:10117/builders/Test-Ubuntu12-ShuttleA-GTX660-x86-Debug/builds/2457/steps/GenerateGMs/logs/stdio)


Original issue's description:
> GrResourceCache2 manages scratch texture.
> 
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/3d398c876440deaab39bbf2a9b881c337e6dc8d4

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

Committed: https://skia.googlesource.com/skia/+/dbe6074a06efc5fb6883bb5e4f251ed67c8c0ab4

[robertphillips, 2014-09-30 13:53:32]

Created Revert of GrResourceCache2 manages scratch texture.

[commit-bot: I haz the power, 2014-09-30 13:54:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/611383003/1

[commit-bot: I haz the power, 2014-09-30 13:54:24]

Committed patchset #1 (id:1) as dbe6074a06efc5fb6883bb5e4f251ed67c8c0ab4