resources: resource identifiers don't begin with leading slash

Change-Id: I52522ffffbf0f5176ac9156cd563b41d6fdde59f
Reviewed-on: https://skia-review.googlesource.com/82940
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
12 files changed