fuzz: dump_canvas

For example: `fuzz --type _dump_canvas -b fuzz_file`

Note well: this command-line usage is subject to change.

Change-Id: Ida7368a699bafe2395604d8428a2d50cb0eff6aa
Reviewed-on: https://skia-review.googlesource.com/9025
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed