added support for PLS path rendering

include/gpu/GrXferProcessor.h

Index: include/gpu/GrXferProcessor.h
diff --git a/include/gpu/GrXferProcessor.h b/include/gpu/GrXferProcessor.h
index ce26709d9ac16432d1dfe0c759777ac2f867e11e..53ee2351340d8840046d3931809d0df534d81b2e 100644
--- a/include/gpu/GrXferProcessor.h
+++ b/include/gpu/GrXferProcessor.h
@@ -350,18 +350,19 @@ protected:
 
     uint32_t fClassID;
 
-private:
-    virtual GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
-                                                   const GrPipelineOptimizations& optimizations,
-                                                   bool hasMixedSamples,
-                                                   const DstTexture*) const = 0;
     /**
      *  Returns true if the XP generated by this factory will explicitly read dst in the fragment
      *  shader.
      */
     virtual bool willReadDstColor(const GrCaps& caps,
                                   const GrPipelineOptimizations& optimizations,
-                                  bool hasMixedSamples) const = 0;
+                                  bool hasMixedSamples) const;
+
+private:
+    virtual GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
+                                                   const GrPipelineOptimizations& optimizations,
+                                                   bool hasMixedSamples,
+                                                   const DstTexture*) const = 0;
 
     virtual bool onIsEqual(const GrXPFactory&) const = 0;