Isolate GrBufferAllocPools inside GrBatchTarget

src/gpu/GrBatch.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 GrBatch_DEFINED
 #define GrBatch_DEFINED
 
 #include <new>
 #include "GrBatchTarget.h"
 #include "GrGeometryProcessor.h"
 #include "GrVertices.h"
 #include "SkRefCnt.h"
 #include "SkThread.h"
 #include "SkTypes.h"
 
 class GrGpu;
-class GrIndexBufferAllocPool;
 class GrPipeline;
-class GrVertexBufferAllocPool;
 
 struct GrInitInvariantOutput;
 
 /*
  * GrBatch is the base class for all Ganesh deferred geometry generators.  To facilitate
  * reorderable batching, Ganesh does not generate geometry inline with draw calls.  Instead, it
  * captures the arguments to the draw and then generates the geometry on demand.  This gives GrBatch
  * subclasses complete freedom to decide how / what they can batch.
  *
  * Batches are created when GrContext processes a draw call. Batches of the same  subclass may be
@@ skipping 142 matching lines @@
     static int32_t gCurrBatchClassID;
 
     SkDEBUGCODE(bool fUsed;)
 
     int fNumberOfDraws;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif