Don't ref/unref the static src-over xp

src/gpu/batches/GrDrawBatch.h

Index: src/gpu/batches/GrDrawBatch.h
diff --git a/src/gpu/batches/GrDrawBatch.h b/src/gpu/batches/GrDrawBatch.h
index 9401c675011649a4ddb35cbe00ac09be67c27096..4d4209ab404439a6944dce94becae8c463e6f0a8 100644
--- a/src/gpu/batches/GrDrawBatch.h
+++ b/src/gpu/batches/GrDrawBatch.h
@@ -83,7 +83,7 @@ public:
                            this->pipeline()->getCoverageFragmentProcessor(i).name(),
                            this->pipeline()->getCoverageFragmentProcessor(i).dumpInfo().c_str());
         }
-        string.appendf("XP: %s\n", this->pipeline()->getXferProcessor()->name());
+        string.appendf("XP: %s\n", this->pipeline()->getXferProcessor().name());
         return string;
     }