Revert "Revert "use GrFPArgs for maskfilters""

This reverts commit 4f7f197c09443232f02cd81f3ac7fb5a216acd05.

Reason for revert: not needed for roll

Original change's description:
> Revert "use GrFPArgs for maskfilters"
> 
> This reverts commit a99b39399522658d7e5ddee97d0e45aa9fceaf89.
> 
> Reason for revert: try to unblock android roller
> 
> Original change's description:
> > use GrFPArgs for maskfilters
> > 
> > Bug: skia:
> > Change-Id: I8516a3b0f6d8301c51f0861c65b9fe8f692fc5e5
> > Reviewed-on: https://skia-review.googlesource.com/97260
> > Commit-Queue: Mike Reed <reed@google.com>
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
> 
> TBR=egdaniel@google.com,bsalomon@google.com,reed@google.com
> 
> Change-Id: Iefe8ed19bba75df86173dec53f5ed4f1ea8724d0
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:
> Reviewed-on: https://skia-review.googlesource.com/97581
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,reed@google.com

Change-Id: I82c0e3234ff1b23c6d08259aae7dcb03087a415e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/97583
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
6 files changed