Revert "Update clearOp for split-OpList world"

This reverts commit 7f1ce29c9bb9be8b2d8dbf9a99f14f74d5dc6d80.

Reason for revert: Maybe causing problems in imagemakewithfilter & dropshadowimagefilter 

Original change's description:
> Update clearOp for split-OpList world
> 
> It would reduce a lot of noise if the GrRenderTargetOpList kept a pointer to the GrCaps but, for now, I'm trying to shrink the GrRTOpList, not expand it.
> 
> Change-Id: Ieed56fa2a41a3fb20234e26552ae2d301147e4f2
> Reviewed-on: https://skia-review.googlesource.com/17323
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Ib23ce4515d9427759ebd2b6d4c9d3a670f00a153
Reviewed-on: https://skia-review.googlesource.com/17326
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
4 files changed