Stable pointers for SkRemoteGlyphCache

Change-Id: I123fcf7da32f0e5e5a14aec95bea684c9190d096
Reviewed-on: https://skia-review.googlesource.com/c/183100
Auto-Submit: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed