[es6] Fix Function and GeneratorFunction built-ins subclassing.

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/objects-inl.h"
@@ skipping 852 matching lines @@
 }
 
 
 void JSFunction::JSFunctionPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "Function");
   os << " - map = " << reinterpret_cast<void*>(map()) << "\n";
   os << " - initial_map = ";
   if (has_initial_map()) os << Brief(initial_map());
   os << "\n - shared_info = " << Brief(shared());
   os << "\n   - name = " << Brief(shared()->name());
+  if (shared()->is_generator()) {
+    os << "\n   - generator";
+  }
   os << "\n - context = " << Brief(context());
   if (shared()->bound()) {
     os << "\n - bindings = " << Brief(function_bindings());
   } else {
     os << "\n - literals = " << Brief(literals());
   }
   os << "\n - code = " << Brief(code());
   os << "\n";
   PrintProperties(os);
   PrintElements(os);
@@ skipping 450 matching lines @@
   }
 }
 
 
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   TransitionArray::PrintTransitions(os, map()->raw_transitions());
 }
 #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
 }  // namespace internal
 }  // namespace v8