Remove drawPosText support for SkBitmapDevice

Change-Id: I84885c3c12bc9ee7b048846c762bf928682e0952
Reviewed-on: https://skia-review.googlesource.com/150362
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
4 files changed