Revert "Remove more GrContext imports & usage"

This reverts commit dd1395526df7fa346fe9d21ef8c9b41b2c0ef748.

Reason for revert: Broke chrome roll

Original change's description:
> Remove more GrContext imports & usage
> 
> Sanity is coming soon!
> 
> Change-Id: I109ebeef9efd7dbf4d76a13e1c05df36d59affbc
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/303661
> Commit-Queue: Adlai Holler <adlai@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>

TBR=robertphillips@google.com,adlai@google.com

Change-Id: I20d770058d4b54193b6cd2fdc9ca5a1e09f84309
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/304056
Reviewed-by: Adlai Holler <adlai@google.com>
Commit-Queue: Adlai Holler <adlai@google.com>
41 files changed