Revert of Add layer counting to SkPictureRecord (https://codereview.chromium.org/464433002/)

Reason for revert:
DM's all segfaulty

http://108.170.220.120:10117/builders/Test-Mac10.7-MacMini4.1-GeForce320M-x86_64-Debug/builds/3866/steps/RunDM/logs/stdio

Original issue's description:
> Add layer counting to SkPictureRecord
>
> This will be used for a SkPicture::suitableForOptimization entry point.
>
> Committed: https://skia.googlesource.com/skia/+/4a2b2e8ed2e35171bf98bad68a69daaced11ec7c

R=bsalomon@google.com, robertphillips@google.com
TBR=bsalomon@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/452673003
6 files changed