Revert "Revert "removed SkSLLayoutLexer""

This reverts commit 734b2a859784af0b16dbbe07570e6d2f5da34e76.

Bug: skia:
Change-Id: I1b8f49ab9d2ec1976f82f4feb70a8d0c5015b654
Reviewed-on: https://skia-review.googlesource.com/143109
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
6 files changed