Add mixed samples support to XPs

src/gpu/effects/GrDisableColorXP.h

Index: src/gpu/effects/GrDisableColorXP.h
diff --git a/src/gpu/effects/GrDisableColorXP.h b/src/gpu/effects/GrDisableColorXP.h
index ee2ed5300b853719547eaf9abb6bb6132e1f9825..e02a23b25ed10c94f42cb598d40b4f3f5364dfbb 100644
--- a/src/gpu/effects/GrDisableColorXP.h
+++ b/src/gpu/effects/GrDisableColorXP.h
@@ -33,11 +33,13 @@ private:
     GrDisableColorXPFactory();
 
     GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
+                                           const GrPipelineBuilder&,
                                            const GrProcOptInfo& colorPOI,
                                            const GrProcOptInfo& coveragePOI,
                                            const DstTexture* dstTexture) const override;
 
     bool willReadDstColor(const GrCaps& caps,
+                          const GrPipelineBuilder&,
                           const GrProcOptInfo& colorPOI,
                           const GrProcOptInfo& coveragePOI) const override {
         return false;