Revert "Remove legacy precision boundary"

This reverts commit a2513c14c4e143984b2eec07f5263b5cdc6c84bb.

Reason for revert: This is breaking the Android roll.

Original change's description:
> Remove legacy precision boundary
> 
> Bug: skia:7731
> Change-Id: I86a87b960541c2bc7b099ca9f609342cb0bbf563
> Reviewed-on: https://skia-review.googlesource.com/115652
> Reviewed-by: Cary Clark <caryclark@google.com>
> Commit-Queue: Yuqian Li <liyuqian@google.com>

TBR=caryclark@google.com,fmalita@chromium.org,liyuqian@google.com,reed@google.com

Change-Id: I45b14f5a84e97cc1022b99c414f90126d368f598
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7731
Reviewed-on: https://skia-review.googlesource.com/115840
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
1 file changed