Clean up handling of lambda capture to use refs correctly

Change-Id: I7f52f46ba8ddb683ab7c156a88d8a7257a5f051b
Reviewed-on: https://skia-review.googlesource.com/c/174041
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed