Switch GrTextTarget from drawPath to drawShape

Change-Id: I96b424c1c9369be4183eeb38729d49fff2ba87f4
Reviewed-on: https://skia-review.googlesource.com/148902
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
5 files changed