Pass in ProcOptInfos into willNeedDstCopy on XPs

include/gpu/GrXferProcessor.h

Index: include/gpu/GrXferProcessor.h
diff --git a/include/gpu/GrXferProcessor.h b/include/gpu/GrXferProcessor.h
index 03d52a93d748f776b6733df8dc1d0a2e2fdb3467..f7487975e53906bdbdd5afa692a44e3b728b992a 100644
--- a/include/gpu/GrXferProcessor.h
+++ b/include/gpu/GrXferProcessor.h
@@ -233,7 +233,8 @@ public:
      */
     virtual bool canTweakAlphaForCoverage() const = 0;
 
-    bool willNeedDstCopy(const GrDrawTargetCaps& caps) const; 
+    bool willNeedDstCopy(const GrDrawTargetCaps& caps, const GrProcOptInfo& colorPOI,
+                         const GrProcOptInfo& coveragePOI) const;
 
     bool isEqual(const GrXPFactory& that) const {
         if (this->classID() != that.classID()) {
@@ -267,7 +268,8 @@ private:
      *  Returns true if the XP generated by this factory will explicitly read dst in the fragment
      *  shader.
      */
-    virtual bool willReadDstColor() const = 0;
+    virtual bool willReadDstColor(const GrProcOptInfo& colorPOI,
+                                  const GrProcOptInfo& coveragePOI) const = 0;
 
     virtual bool onIsEqual(const GrXPFactory&) const = 0;