General clean up on bookmaker.

Command line runs without error for
SkBitmap, SkPath, SkRect, SkIRect,
SkPixmap, SkCanvas.

Docs-Preview: https://skia.org/?cl=57112
TBR: caryclark@google.com
Bug: skia:6898
Change-Id: I73b69ae8ffdf0a1e6bc187dc8a9dfb28f7766faa
Reviewed-on: https://skia-review.googlesource.com/57112
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
18 files changed