Make GrGLInterface great for Win32 x86 again

Bug: skia:8262
Change-Id: I607644198d5dc7992e2b89eb34651eb1dc88c6ba
Reviewed-on: https://skia-review.googlesource.com/149225
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
7 files changed