Expose an API method for getting JSObject constructor name

src/profile-generator.cc

Index: src/profile-generator.cc
===================================================================
--- src/profile-generator.cc	(revision 5888)
+++ src/profile-generator.cc	(working copy)
@@ -1295,8 +1295,8 @@
   } else if (object->IsJSObject()) {
     return AddEntry(object,
                     HeapEntry::kObject,
-                    collection_->GetName(
-                        JSObject::cast(object)->constructor_name()),
+                    collection_->GetName(GetConstructorNameForHeapProfile(
+                        JSObject::cast(object))),
                     children_count,
                     retainers_count);
   } else if (object->IsString()) {
@@ -2769,6 +2769,12 @@
   sorted_entries->Sort(SortUsingEntryValue);
 }
 
+
+String* GetConstructorNameForHeapProfile(JSObject* object) {
+  if (object->IsJSFunction()) return Heap::closure_symbol();
+  return object->constructor_name();
+}
+
 } }  // namespace v8::internal
 
 #endif  // ENABLE_LOGGING_AND_PROFILING