Remove willReadDst from GrFragmentProcessor.

src/gpu/GrDrawState.h

Index: src/gpu/GrDrawState.h
diff --git a/src/gpu/GrDrawState.h b/src/gpu/GrDrawState.h
index ce29e6ca6894a2fd57ee77c7e39ea5df29699693..c02429f9658f7aa624923058bf2b44ff4a260373 100644
--- a/src/gpu/GrDrawState.h
+++ b/src/gpu/GrDrawState.h
@@ -108,10 +108,10 @@ public:
     const GrFragmentStage& getCoverageStage(int idx) const { return fCoverageStages[idx]; }
 
     /**
-     * Checks whether any of the effects will read the dst pixel color.
-     * TODO remove when we have an XP
+     * Checks whether the xp will read the dst pixel color.
+     * TODO: remove when we have dstCpy contained inside of GrXP
      */
-    bool willEffectReadDstColor(const GrPrimitiveProcessor*) const;
+    bool willEffectReadDstColor() const;
 
     /**
      * The xfer processor factory.