Move DrawingManager to RecordingContext

This CL does make use of a new GrRecordingContextPriv backdoor to break CL deadlocks. This occurs when this CL tries to create GrContext-dependent objects outside its scope.

Change-Id: I278fe9d321f8e0a4f5e9b489b1a5cc01b8974521
Reviewed-on: https://skia-review.googlesource.com/c/191287
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
30 files changed