Improve Code object support in service and observatory

runtime/vm/profiler.cc

Index: runtime/vm/profiler.cc
diff --git a/runtime/vm/profiler.cc b/runtime/vm/profiler.cc
index b967123466e3ff9856cd092bebba57885d70df56..7bdd813b590129eaee47aaaf289c11f115c5752f 100644
--- a/runtime/vm/profiler.cc
+++ b/runtime/vm/profiler.cc
@@ -294,6 +294,11 @@ class CodeRegion : public ZoneAllocated {
     }
   }
 
+  void DebugPrint() {
+    printf("%s [%" Px ", %" Px ") %s\n", name_, start(), end(),
+           KindToCString(kind_));
+  }
+
   void AddTickAtAddress(uintptr_t pc) {
     const intptr_t length = address_table_->length();
     intptr_t i = 0;