fixing GrBatch leak

src/gpu/GrAAHairLinePathRenderer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAAHairLinePathRenderer.h"
 
 #include "GrBatch.h"
@@ skipping 1040 matching lines @@
     devRect.outset(2, 2);
 
     AAHairlineBatch::Geometry geometry;
     geometry.fColor = color;
     geometry.fCoverage = newCoverage;
     geometry.fViewMatrix = viewMatrix;
     geometry.fPath = path;
     SkDEBUGCODE(geometry.fDevBounds = devRect;)
     geometry.fDevClipBounds = devClipBounds;
 
-    GrBatch* batch = AAHairlineBatch::Create(geometry, fLinesIndexBuffer, fQuadsIndexBuffer);
+    SkAutoTUnref<GrBatch> batch(AAHairlineBatch::Create(geometry, fLinesIndexBuffer,
+                                                        fQuadsIndexBuffer));
     target->drawBatch(pipelineBuilder, batch, &devRect);
 
     return true;
 }