Introduce extended mode.

src/execution.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 139 matching lines @@
   *pending_exception = false;
 
   if (!callable->IsJSFunction()) {
     callable = TryGetFunctionDelegate(callable, pending_exception);
     if (*pending_exception) return callable;
   }
   Handle<JSFunction> func = Handle<JSFunction>::cast(callable);
 
   // In non-strict mode, convert receiver.
   if (convert_receiver && !receiver->IsJSReceiver() &&
-      !func->shared()->native() && !func->shared()->strict_mode()) {
+      !func->shared()->native() && func->shared()->is_classic_mode()) {
     if (receiver->IsUndefined() || receiver->IsNull()) {
       Object* global = func->context()->global()->global_receiver();
       // Under some circumstances, 'global' can be the JSBuiltinsObject
       // In that case, don't rewrite.
       // (FWIW, the same holds for GetIsolate()->global()->global_receiver().)
       if (!global->IsJSBuiltinsObject()) receiver = Handle<Object>(global);
     } else {
       receiver = ToObject(receiver, pending_exception);
     }
     if (*pending_exception) return callable;
@@ skipping 727 matching lines @@
     return isolate->TerminateExecution();
   }
   if (stack_guard->IsInterrupted()) {
     stack_guard->Continue(INTERRUPT);
     return isolate->StackOverflow();
   }
   return isolate->heap()->undefined_value();
 }
 
 } }  // namespace v8::internal