Implement GrFragmentProcessor::clone for 6 additional subclasses.

PremulInputFragmentProcessor
UnpremulInputFragmentProcessor
PremulFragmentProcessor
ReplaceInputFragmentProcessor
SeriesFragmentProcessor

Change-Id: Ided1a6c6b66e12bfd8ee005950443333cc23b830
Reviewed-on: https://skia-review.googlesource.com/26680
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed