Introduce extended mode.

src/hydrogen.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 6669 matching lines @@
   HEnvironment* inner =
       new(zone) HEnvironment(outer, function->scope(), target);
   // Get the argument values from the original environment.
   for (int i = 0; i <= arity; ++i) {  // Include receiver.
     HValue* push = ExpressionStackAt(arity - i);
     inner->SetValueAt(i, push);
   }
   // If the function we are inlining is a strict mode function or a
   // builtin function, pass undefined as the receiver for function
   // calls (instead of the global receiver).
-  if ((target->shared()->native() || function->strict_mode()) &&
+  if ((target->shared()->native() || function->is_strict_or_extended_mode()) &&
       call_kind == CALL_AS_FUNCTION) {
     inner->SetValueAt(0, undefined);
   }
   inner->SetValueAt(arity + 1, outer->LookupContext());
   for (int i = arity + 2; i < inner->length(); ++i) {
     inner->SetValueAt(i, undefined);
   }
 
   inner->set_ast_id(AstNode::kFunctionEntryId);
   return inner;
@@ skipping 332 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal