Push isEqual/onIsEqual down from GrProcessor to subclasses.

src/effects/SkColorFilters.cpp

Index: src/effects/SkColorFilters.cpp
diff --git a/src/effects/SkColorFilters.cpp b/src/effects/SkColorFilters.cpp
index 333b21af8c86f8855f613b2055c86b4d07b8828c..9616ad5151ee8c3bf21de16e10b9c244b3626144 100644
--- a/src/effects/SkColorFilters.cpp
+++ b/src/effects/SkColorFilters.cpp
@@ -286,7 +286,7 @@ private:
         }
     }
 
-    virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE {
+    virtual bool onIsEqual(const GrFragmentProcessor& other) const SK_OVERRIDE {
         const ModeColorFilterEffect& s = other.cast<ModeColorFilterEffect>();
         return fMode == s.fMode && fColor == s.fColor;
     }