add a ClassID function to GrBatch

src/gpu/batches/GrStencilPathBatch.h

Index: src/gpu/batches/GrStencilPathBatch.h
diff --git a/src/gpu/batches/GrStencilPathBatch.h b/src/gpu/batches/GrStencilPathBatch.h
index 9f6740a04648d7cd4fdd5a30c7803327acfc178f..a0dcadb620eae059bbbe5ad5f21d13b6af3cef1f 100644
--- a/src/gpu/batches/GrStencilPathBatch.h
+++ b/src/gpu/batches/GrStencilPathBatch.h
@@ -17,6 +17,8 @@
 
 class GrStencilPathBatch final : public GrBatch {
 public:
+    DEFINE_BATCH_CLASS_ID
+
     static GrBatch* Create(const SkMatrix& viewMatrix,
                            bool useHWAA,
                            const GrStencilSettings& stencil,
@@ -43,13 +45,13 @@ private:
                        const GrScissorState& scissor,
                        GrRenderTarget* renderTarget,
                        const GrPath* path)
-    : fViewMatrix(viewMatrix)
+    : INHERITED(ClassID())
+    , fViewMatrix(viewMatrix)
     , fUseHWAA(useHWAA)
     , fStencil(stencil)
     , fScissor(scissor)
     , fRenderTarget(renderTarget)
     , fPath(path) {
-        this->initClassID<GrStencilPathBatch>();
         fBounds = path->getBounds();
     }
 
@@ -69,6 +71,8 @@ private:
     GrScissorState                                          fScissor;
     GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
     GrPendingIOResource<const GrPath, kRead_GrIOType>       fPath;
+
+    typedef GrBatch INHERITED;
 };
 
 #endif