Revert of Simplify SkGpuBlurUtils::GaussianBlur method

Revert of Simplify SkGpuBlurUtils::GaussianBlur method (patchset #2 id:20001 of https://codereview.chromium.org/1958603002/ )

Reason for revert:
Looks like it's causing some issues with the bleed_image GM.

Original issue's description:
> Simplify SkGpuBlurUtils::GaussianBlur method
> 
> No one was using the canClobberSrc capability and moving the direct filtering case forward makes the rest of the logic simpler.
> 
> Split out of: https://codereview.chromium.org/1959493002/ (Retract GrRenderTarget from SkGpuBlurUtils)
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1958603002
> 
> Committed: https://skia.googlesource.com/skia/+/56a85e69a8d034e0fdee00e8207cda0a9da06fee

TBR=bsalomon@google.com,robertphillips@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/67a58dcd4a1e79e5832161ae953526d27893aa61

[jvanverth1, 2016-05-06 20:04:52]

Created Revert of Simplify SkGpuBlurUtils::GaussianBlur method

[commit-bot: I haz the power, 2016-05-06 20:05:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1956023002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1956023002/1

[commit-bot: I haz the power, 2016-05-06 20:05:12]

Description was changed from

==========
Revert of Simplify SkGpuBlurUtils::GaussianBlur method (patchset #2 id:20001 of
https://codereview.chromium.org/1958603002/ )

Reason for revert:
Looks like it's causing some issues with the bleed_image GM.

Original issue's description:
> Simplify SkGpuBlurUtils::GaussianBlur method
> 
> No one was using the canClobberSrc capability and moving the direct filtering
case forward makes the rest of the logic simpler.
> 
> Split out of: https://codereview.chromium.org/1959493002/ (Retract
GrRenderTarget from SkGpuBlurUtils)
> 
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/56a85e69a8d034e0fdee00e8207cda0a9da06fee

TBR=bsalomon@google.com,robertphillips@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Simplify SkGpuBlurUtils::GaussianBlur method (patchset #2 id:20001 of
https://codereview.chromium.org/1958603002/ )

Reason for revert:
Looks like it's causing some issues with the bleed_image GM.

Original issue's description:
> Simplify SkGpuBlurUtils::GaussianBlur method
> 
> No one was using the canClobberSrc capability and moving the direct filtering
case forward makes the rest of the logic simpler.
> 
> Split out of: https://codereview.chromium.org/1959493002/ (Retract
GrRenderTarget from SkGpuBlurUtils)
> 
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/56a85e69a8d034e0fdee00e8207cda0a9da06fee

TBR=bsalomon@google.com,robertphillips@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed:
https://skia.googlesource.com/skia/+/67a58dcd4a1e79e5832161ae953526d27893aa61
==========

[commit-bot: I haz the power, 2016-05-06 20:05:13]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/67a58dcd4a1e79e5832161ae953526d27893aa61

[robertphillips, 2016-05-09 13:24:18]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1961953002/ by robertphillips@google.com.

The reason for reverting is: May not be as bad as was thought.