WebP - allow more scales

We previously artificially restricted to using sample sizes. But there
is no reason to do so. Android's new API allows arbitrary scaling, so
support it.

Change-Id: I15f48f9b27b11f8cabb55e3f79ae6ee5ffd39069
Reviewed-on: https://skia-review.googlesource.com/69600
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
1 file changed