Revert of Make SkBlurImageFilter capable of cropping during blur

Revert of Make SkBlurImageFilter capable of cropping during blur (patchset #16 id:400001 of https://codereview.chromium.org/1415653003/ )

Reason for revert:
ASAN failures (see https://codereview.chromium.org/1415653003/)

Original issue's description:
> Make SkBlurImageFilter capable of cropping during blur (raster path)
> 
> SkBlurImageFilter can currently only process a source image 
> which is larger than or equal to the destination rect. If
> the source image (or crop rect) is smaller, it is padded
> out to dest size with transparent black via the 6-param
> version of applyCropRect().
> 
> Fixing this requires modifying all the flavours of RGBA 
> box_blur() to accept a src crop rect.
> 
> BUG=skia:4502, skia:4526
> CQ_EXTRA_TRYBOTS=client.skia.android:Test-Android-GCC-Nexus5-CPU-NEON-Arm7-Release-Trybot;client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
> 
> Committed: https://skia.googlesource.com/skia/+/1b82ceb737c73327412f2e8a91748481e1aec9e4

TBR=mtklein@google.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4502, skia:4526
Committed: https://skia.googlesource.com/skia/+/8de01c642c145e9a6e0b9d68066e9fe63c4c5492

[Stephen White, 2015-11-02 19:56:02]

Created Revert of Make SkBlurImageFilter capable of cropping during blur

[commit-bot: I haz the power, 2015-11-02 19:56:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1428053002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1428053002/1

[commit-bot: I haz the power, 2015-11-02 19:56:22]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/8de01c642c145e9a6e0b9d68066e9fe63c4c5492