Track live instance and allocation counts for classes

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 8904f6d41bceb339a0f32d1f7cca29b1e26a19ba..2a03cba1513f810164c6d3acc18160e638a46fed 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -443,6 +443,7 @@ class RawObject {
   friend class ExternalTypedData;
   friend class Heap;
   friend class HeapProfiler;
+  friend class ClassStatsVisitor;
   friend class HeapProfilerRootVisitor;
   friend class MarkingVisitor;
   friend class Object;
@@ -452,6 +453,7 @@ class RawObject {
   friend class RawInstance;
   friend class RawTypedData;
   friend class Scavenger;
+  friend class ScavengerVisitor;
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class String;
@@ -476,6 +478,7 @@ class RawClass : public RawObject {
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
+  RawString* user_name_;
   RawArray* functions_;
   RawArray* fields_;
   RawArray* offset_in_words_to_field_;