Revert "Move SkGpuDevice.h to src/gpu"

This reverts commit d99bbb61e58e8bd34db3954147ce1c9166fe4637.

Causing Chrome canary failures as well as failures of Chrome trybots due to
not cleaning up properly after failed DEPS roll attempts.

BUG=skia:
R=bsalomon@google.com, reed@google.com
TBR=bsalomon, reed

Author: borenet@google.com

Review URL: https://codereview.chromium.org/579733003
3 files changed