Fix name shown by devtools for subclasses.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 93f57333a150498810f73f264c74082e2147ff3b..0b5128a881fbdca6e9bb761bdce585ea4114e50e 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1925,7 +1925,7 @@ class JSReceiver: public HeapObject {
 
   // Returns the constructor name (the name (possibly, inferred name) of the
   // function that was used to instantiate the object).
-  String* constructor_name();
+  static Handle<String> GetConstructorName(Handle<JSReceiver> receiver);
 
   MUST_USE_RESULT static inline Maybe<PropertyAttributes> GetPropertyAttributes(
       Handle<JSReceiver> object, Handle<Name> name);
@@ -5728,10 +5728,6 @@ class Map: public HeapObject {
   static Handle<Map> Normalize(Handle<Map> map, PropertyNormalizationMode mode,
                                const char* reason);
 
-  // Returns the constructor name (the name (possibly, inferred name) of the
-  // function that was used to instantiate the object).
-  String* constructor_name();
-
   // Tells whether the map is used for JSObjects in dictionary mode (ie
   // normalized objects, ie objects for which HasFastProperties returns false).
   // A map can never be used for both dictionary mode and fast mode JSObjects.
@@ -6235,8 +6231,6 @@ class PrototypeInfo : public Struct {
   // given receiver embed the currently valid cell for that receiver's prototype
   // during their compilation and check it on execution.
   DECL_ACCESSORS(validity_cell, Object)
-  // [constructor_name]: User-friendly name of the original constructor.
-  DECL_ACCESSORS(constructor_name, Object)
 
   DECLARE_CAST(PrototypeInfo)