Revert of Fix Morphology effects sourcing outside of the crop rect. (patchset #6...

Revert of Fix Morphology effects sourcing outside of the crop rect. (patchset #6 id:100001 of https://codereview.chromium.org/781153002/)

Reason for revert:
Looks like this is causing memory leaks:
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu13.10-GCE-NoGPU-x86_64-Debug-ASAN/builds/1155/steps/dm/logs/stdio

And causing crashes on Mac 10.6:
http://build.chromium.org/p/client.skia/builders/Test-Mac10.6-MacMini4.1-GeForce320M-x86_64-Debug/builds/1417/steps/dm/logs/stdio

Original issue's description:
> Fix Morphology effects sourcing outside of the crop rect.
>
> BUG=skia:1766
>
> Committed: https://skia.googlesource.com/skia/+/f6be925b5615f07039ce95c3433039694a8d1679

TBR=junov@google.com,junov@chromium.org,bsalomon@google.com,reed@google.com,cwallez@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:1766

Review URL: https://codereview.chromium.org/868973005