Revert "Remove previous blur image implementation"

This reverts commit a11346dd24fa7122246dc96ba15604713e460036.

Reason for revert: Compile problems on linux

Original change's description:
> Remove previous blur image implementation
> 
> Change-Id: Ie3bada767f0ba945cb17f174f179510768eb178d
> Reviewed-on: https://skia-review.googlesource.com/77583
> Commit-Queue: Herb Derby <herb@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,herb@google.com

Change-Id: I5f157fbc2fd4e2a37618dc9c0e72621ff9892ef6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/81100
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
5 files changed