Provide record time allocator to onCombineIfPossible()

Change-Id: I3acf5d5fdb29bfbd3407a8065b7567dff43503a0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259427
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
33 files changed