Replace GrContextPriv::read/writeSurfacePixels with GrContextPriv::read/WritePixels2

Change-Id: I08be0f347d360e97bf9a6d1aeb25f9f584cc3d89
Reviewed-on: https://skia-review.googlesource.com/131442
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
10 files changed