Clean up SkShaper_coretext.cpp & SkCGBase.h

- Use SkUniqueCFRef.
- Use CFShow to print dictionary.
- Use CGFLOAT_IS_DOUBLE define.
- Use kCFAllocatorDefault consistently.

Change-Id: If0276cab0182d33aacf1060a734b8b025e16f99e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295010
Commit-Queue: Adlai Holler <adlai@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Auto-Submit: Adlai Holler <adlai@google.com>
2 files changed