gn_to_bp to recurse deps.

Currently gn_to_bp GrabDependentSrcs only grabs the top level deps of
a target. In a proposed change there are more levels of deps to
clarify the real dependencies. To make this work well, a number of
lists are now sets to avoid including the same file multiple times.

Change-Id: I5005718e42762fe411215920e8991ab27138c7eb
Reviewed-on: https://skia-review.googlesource.com/8936
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed