Revert "Move atlas manager creation to GrContext derived classes"

This reverts commit e5b7ceeac865fb8a3bab82a73d65752c78682718.

Reason for revert: Breaking Mus/Viz tests in Chrome roll

Original change's description:
> Move atlas manager creation to GrContext derived classes
> 
> This CL relies on: https://skia-review.googlesource.com/c/skia/+/108001 (Fission GrAtlasGlyphCache in two)
> 
> TBR=bsalomon@google.com
> Change-Id: Ic3f91cea2238221b970f8ebbda99b10202925cd8
> Reviewed-on: https://skia-review.googlesource.com/110621
> Commit-Queue: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: I3973463b7b837145d9732171a91d82f0f0cea148
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/110821
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
4 files changed