Init class ID in GrStencilPathBatch

src/gpu/batches/GrStencilPathBatch.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 GrStencilPathBatch_DEFINED
 #define GrStencilPathBatch_DEFINED
 
@@ skipping 31 matching lines @@
                        bool useHWAA,
                        const GrStencilSettings& stencil,
                        const GrScissorState& scissor,
                        GrRenderTarget* renderTarget,
                        const GrPath* path)
     : fViewMatrix(viewMatrix)
     , fUseHWAA(useHWAA)
     , fStencil(stencil)
     , fScissor(scissor)
     , fRenderTarget(renderTarget)
-    , fPath(path) {}
+    , fPath(path) {
+        this->initClassID<GrStencilPathBatch>();
+    }
 
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
 
     void onPrepare(GrBatchFlushState*) override {}
 
     void onDraw(GrBatchFlushState* state) override {
         GrPathRendering::StencilPathArgs args(fUseHWAA, fRenderTarget.get(), &fViewMatrix,
                                               &fScissor, &fStencil);
         state->gpu()->pathRendering()->stencilPath(args, fPath.get());
     }
 
     SkMatrix                                                fViewMatrix;
     bool                                                    fUseHWAA;
     GrStencilSettings                                       fStencil;
     GrScissorState                                          fScissor;
     GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
     GrPendingIOResource<const GrPath, kRead_GrIOType>       fPath;
 };
 
 #endif