add a ClassID function to GrBatch

src/gpu/batches/GrDrawAtlasBatch.cpp

Index: src/gpu/batches/GrDrawAtlasBatch.cpp
diff --git a/src/gpu/batches/GrDrawAtlasBatch.cpp b/src/gpu/batches/GrDrawAtlasBatch.cpp
index 3596e16861fa6a51b4b73a9b759a8a5ecf8fa57c..2254e9cdfec6573ba3afc6065bd5eaf1780effa6 100644
--- a/src/gpu/batches/GrDrawAtlasBatch.cpp
+++ b/src/gpu/batches/GrDrawAtlasBatch.cpp
@@ -77,8 +77,8 @@ void GrDrawAtlasBatch::onPrepareDraws(Target* target) {
 
 GrDrawAtlasBatch::GrDrawAtlasBatch(const Geometry& geometry, const SkMatrix& viewMatrix,
                                    int spriteCount, const SkRSXform* xforms, const SkRect* rects,
-                                   const SkColor* colors) {
-    this->initClassID<GrDrawAtlasBatch>();
+                                   const SkColor* colors)
+    : INHERITED(ClassID()) {
     SkASSERT(xforms);
     SkASSERT(rects);