add a ClassID function to GrBatch

src/gpu/batches/GrCopySurfaceBatch.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 GrCopySurfaceBatch_DEFINED
 #define GrCopySurfaceBatch_DEFINED
 
 #include "GrBatch.h"
 #include "GrBatchFlushState.h"
 #include "GrGpu.h"
 #include "GrRenderTarget.h"
 
 class GrCopySurfaceBatch final : public GrBatch {
 public:
     static GrBatch* Create(GrSurface* dst, GrSurface* src, const SkIRect& srcRect,
                            const SkIPoint& dstPoint);
 
+    BATCH_CLASS_ID
+
     const char* name() const override { return "CopySurface"; }
 
     uint32_t renderTargetUniqueID() const override {
         GrRenderTarget* rt = fDst.get()->asRenderTarget();
         return rt ? rt->getUniqueID() : 0;
     }
 
     SkString dumpInfo() const override {
         SkString string;
         string.printf("SRC: 0x%p, DST: 0x%p, SRECT: [L: %d, T: %d, R: %d, B: %d], "
@@ skipping 23 matching lines @@
         state->gpu()->copySurface(fDst.get(), fSrc.get(), fSrcRect, fDstPoint);
     }
 
     GrPendingIOResource<GrSurface, kWrite_GrIOType> fDst;
     GrPendingIOResource<GrSurface, kRead_GrIOType>  fSrc;
     SkIRect                                         fSrcRect;
     SkIPoint                                        fDstPoint;
 };
 
 #endif