Init hardware buffer state in GrGLGpu

Change-Id: I827e158703941ef61b2f390751b7521acdeeb951
Reviewed-on: https://skia-review.googlesource.com/42824
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed