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

src/gpu/batches/GrDrawBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawBatch_DEFINED
 #define GrDrawBatch_DEFINED
 
@@ skipping 65 matching lines @@
             string.appendf("\t\t%s\n\t\t%s\n",
                            this->pipeline()->getColorFragmentProcessor(i).name(),
                            this->pipeline()->getColorFragmentProcessor(i).dumpInfo().c_str());
         }
         string.append("CoverageStages:\n");
         for (int i = 0; i < this->pipeline()->numCoverageFragmentProcessors(); i++) {
             string.appendf("\t\t%s\n\t\t%s\n",
                            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;
     }
 
 protected:
     virtual void computePipelineOptimizations(GrInitInvariantOutput* color, 
                                               GrInitInvariantOutput* coverage,
                                               GrBatchToXPOverrides* overrides) const = 0;
 
 private:
     /**
      * initBatchTracker is a hook for the some additional overrides / optimization possibilities
      * from the GrXferProcessor.
      */
     virtual void initBatchTracker(const GrXPOverridesForBatch&) = 0;
 
 protected:
     SkTArray<SkAutoTUnref<GrBatchUploader>, true>   fInlineUploads;
 
 private:
     SkAlignedSTStorage<1, GrPipeline>               fPipelineStorage;
     bool                                            fPipelineInstalled;
     typedef GrBatch INHERITED;
 };
 
 #endif