Reland "Revert "custom typeface""

This reverts commit 61642b33663b968c22b5479cfde162cd5ae4b5ae.

Reason for revert: ../../src/utils/SkCustomTypeface.cpp(179,20): error: cannot decompose this type; 'std::tuple_size<const SkPoint>::value' is not a valid integral constant expression

Original change's description:
> Revert "Revert "custom typeface""
> 
> Fix: implement onComputeBounds() and generateFontMetrics()
> 
> This reverts commit 0066adefa97dccddf75a73d0cecf2cf7374cd146.
> 
> Change-Id: Idb59336a3d201bb97e494ee0e0bb189e0a7186f1
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/288536
> Commit-Queue: Mike Reed <reed@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>

TBR=bungeman@google.com,reed@google.com

# Not skipping CQ checks because this is a reland.

Change-Id: I6845bb96a00a0c9ee54704a4c299556cc32e6438
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/288557
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
7 files changed