GitLab

This CL:
1. Removes Android-specific code from paint_preview_base_service.(cc|h).
2. Replaces the PaintPreviewBaseService Java class with the
   NativePaintPreviewServiceProvider interface. This enables each
   implementer of paint_preview_base_service.cc to independently handle
   its JNI communications.

Bug: 1058405
Change-Id: Id629aa95560cb4c0f202079c1437a16c67798d0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2090592Reviewed-by: Calder Kitagawa <ckitagawa@chromium.org>
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747475}