Rename Chromecast CPU tests to GPU tests

Also fix command flags to use skps instead of svgs

Bug: skia:6706
Change-Id: Ie099abac738e6eb8808db9aef513a51940c5ccb1
Reviewed-on: https://skia-review.googlesource.com/18441
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
5 files changed