Reland of add a ClassID function to GrBatch

src/gpu/batches/GrDefaultPathRenderer.cpp

Index: src/gpu/batches/GrDefaultPathRenderer.cpp
diff --git a/src/gpu/batches/GrDefaultPathRenderer.cpp b/src/gpu/batches/GrDefaultPathRenderer.cpp
index f4ce7c85a52bfc9ca818dad8f87e477e35033f2e..67bccb63b47346382bdd24487bd9f4ff99e98ac0 100644
--- a/src/gpu/batches/GrDefaultPathRenderer.cpp
+++ b/src/gpu/batches/GrDefaultPathRenderer.cpp
@@ -211,6 +211,8 @@
 
 class DefaultPathBatch : public GrVertexBatch {
 public:
+    DEFINE_BATCH_CLASS_ID
+
     struct Geometry {
         GrColor fColor;
         SkPath fPath;
@@ -376,8 +378,8 @@
     SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
 
     DefaultPathBatch(const Geometry& geometry, uint8_t coverage, const SkMatrix& viewMatrix,
-                     bool isHairline, const SkRect& devBounds) {
-        this->initClassID<DefaultPathBatch>();
+                     bool isHairline, const SkRect& devBounds)
+        : INHERITED(ClassID()) {
         fBatch.fCoverage = coverage;
         fBatch.fIsHairline = isHairline;
         fBatch.fViewMatrix = viewMatrix;
@@ -530,6 +532,8 @@
 
     BatchTracker fBatch;
     SkSTArray<1, Geometry, true> fGeoData;
+
+    typedef GrVertexBatch INHERITED;
 };
 
 bool GrDefaultPathRenderer::internalDrawPath(GrDrawTarget* target,