Revert "Revert "Move SkGpuDevice.h to src/gpu""

This reverts commit b0a35f7c5d2c4bfeb601e3ac43f412d202a25292.

R=borenet@google.com
TBR=borenet@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/575783003
3 files changed