Revert of By default purge resources that haven't been used for 64 flushes

Revert of By default purge resources that haven't been used for 64 flushes (patchset #4 id:60001 of https://codereview.chromium.org/1316233003/ )

Reason for revert:
Breaking again

Original issue's description:
> By default purge resources that haven't been used for 64 flushes
> 
> BUG=skia:4258
> 
> Committed: https://skia.googlesource.com/skia/+/85047175508a24f43eef49359bed215a2a3bb104
> 
> R=robertphillips@google.com
> 
> Committed: https://skia.googlesource.com/skia/+/71d0c33068d41878cc3117f3761f49300f6b3d54
> 
> Committed: https://skia.googlesource.com/skia/+/bd783cd5b62118277b75933c3cd7b9097129259a

TBR=robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4258
Committed: https://skia.googlesource.com/skia/+/9ceb6b54474b1f1b7427f3adcfe8092bc45629c6

[bsalomon, 2015-08-31 18:37:44]

Created Revert of By default purge resources that haven't been used for 64
flushes

[commit-bot: I haz the power, 2015-08-31 18:37:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1322753004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1322753004/1

[commit-bot: I haz the power, 2015-08-31 18:38:03]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/9ceb6b54474b1f1b7427f3adcfe8092bc45629c6