Fix param name in GrEffect::CastEffect

include/gpu/GrEffect.h

Index: include/gpu/GrEffect.h
diff --git a/include/gpu/GrEffect.h b/include/gpu/GrEffect.h
index 575e3eaf946513fee7a1c46063d99189ed38ada5..781a29d289a5fcf84bedc4c3e5060059071eac0f 100644
--- a/include/gpu/GrEffect.h
+++ b/include/gpu/GrEffect.h
@@ -169,11 +169,11 @@ protected:
         , fWillUseInputColor(true)
         , fHasVertexCode(false) {}
 
-    /** Helper for down-casting to a GrEffect subclass
+    /**
+      * Helper for down-casting to a GrEffect subclass
       */
-    template <typename T>
-    static const T& CastEffect(const GrEffect& effectRef) {
-        return *static_cast<const T*>(&effectRef);
+    template <typename T> static const T& CastEffect(const GrEffect& effect) {
+        return *static_cast<const T*>(&effect);
     }
 
     /**