Make block size a template parameter of SkTLList

src/gpu/batches/GrDrawPathBatch.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 GrDrawPathBatch_DEFINED
 #define GrDrawPathBatch_DEFINED
 
@@ skipping 153 matching lines @@
     GrDrawPathRangeBatch(const SkMatrix& viewMatrix, const SkMatrix& localMatrix, GrColor color,
                          GrPathRange* range, GrPathRangeDraw* draw);
 
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override;
 
     void onPrepare(GrBatchFlushState*) override {}
 
     void onDraw(GrBatchFlushState* state) override;
 
     typedef GrPendingIOResource<const GrPathRange, kRead_GrIOType> PendingPathRange;
-    typedef SkTLList<GrPathRangeDraw*> DrawList;
+    typedef SkTLList<GrPathRangeDraw*, 4> DrawList;
     PendingPathRange    fPathRange;
     DrawList            fDraws;
     int                 fTotalPathCount;
     SkMatrix            fLocalMatrix;
 
     typedef GrDrawPathBatchBase INHERITED;
 };
 
 #endif