changed skslc layout parsing strategy

Change-Id: I322f0682a8753beb858012b00ee7e4ec6b206c2f
Reviewed-on: https://skia-review.googlesource.com/9081
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
10 files changed