tree d0e264a2d1289cdfc46a5026ca45a7a57095c250
parent f028003cf4429813ae1ac6624efa51ecbb062ed3
author reed <reed@google.com> 1444674602 -0700
committer Commit bot <commit-bot@chromium.org> 1444674602 -0700

add applyFilter() to SkImage

Result:
- clients can get a filtered version of an image without having to setup a temp drawing environment
- for some cases, the process is more efficient even than (deprecated) drawSprite, since there is no need to draw/copy the result

Impl:
- made Proxy virtual so we don't need to have an existing device to use it

This, in conjunction with LocalMatrixImageFilter, should allow us to simplify and optimize ApplyImageFilter() in cc/output/gl_renderer.cc

BUG=skia:

Review URL: https://codereview.chromium.org/1390913005