Revert of allow canvas to force conservative clips (for speed) (patchset #7 id:120001 of https://codereview.chromium.org/541593005/)

Reason for revert:
multipicturedraw failed on nvprmsaa -- don't know why yet

Original issue's description:
> Allow SkCanvas to be initialized to force conservative rasterclips. This has the following effects:
>
> 1. Queries to the current clip will be conservatively large. This can mean the quickReject may return false more often.
>
> 2. The conservative clips mean less work is done.
>
> 3. Enabled by default for Gpu, Record, and NoSaveLayer canvases.
>
> 4. API is private for now.
>
> Committed: https://skia.googlesource.com/skia/+/27a5e656c3d6ef22f9cb34de18e1b960da3aa241

R=robertphillips@google.com, bsalomon@google.com, mtklein@google.com, junov@google.com
TBR=bsalomon@google.com, junov@google.com, mtklein@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Author: reed@google.com

Review URL: https://codereview.chromium.org/554033003
12 files changed