Expose field data, use class id, and merge all collections into "objects"

runtime/vm/class_table.h

Index: runtime/vm/class_table.h
diff --git a/runtime/vm/class_table.h b/runtime/vm/class_table.h
index 8fe8159a768d141c0a556bf1e7ef0f8e79637912..6ea4dfa7034b94199d53dd94381ad803e3af19c8 100644
--- a/runtime/vm/class_table.h
+++ b/runtime/vm/class_table.h
@@ -13,6 +13,7 @@ namespace dart {
 class Class;
 class ObjectPointerVisitor;
 class RawClass;
+class JSONStream;
 
 class ClassTable {
  public:
@@ -41,6 +42,8 @@ class ClassTable {
 
   void Print();
 
+  void PrintToJSONStream(JSONStream* stream);
+
   static intptr_t table_offset() {
     return OFFSET_OF(ClassTable, table_);
   }