Fix GPU-less build.



git-svn-id: http://skia.googlecode.com/svn/trunk@7224 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 91e239c..810c9de 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -488,7 +488,7 @@
 
 #else
 
-GrEffect* SkSweepGradient::asNewEffect(GrContext* context, const SkPaint&) const {
+GrEffectRef* SkSweepGradient::asNewEffect(GrContext*, const SkPaint&) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return NULL;
 }