Fix flushing of context in ViaDDL

Change-Id: I9f84f4081861e2789b45787405e0f1a5aa87824d
Reviewed-on: https://skia-review.googlesource.com/116546
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed