Pass runtime-effect dictionary to GenerateRuntimeShaderGlueCode.

At long last, we can retrieve our SkRuntimeEffect from within the
Graphite glue code. In this CL, we simply assert that it can be found
in the dictionary.

Change-Id: I43e8296a0138b6dddae78fd4fbc80c8f5afa1da5
Bug: skia:13405
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/556797
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
5 files changed