[ast] Simplify a condition.

src/ast/variables.cc

 // Copyright 2011 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/ast/variables.h"
 
 #include "src/ast/scopes.h"
 #include "src/globals.h"
 #include "src/objects-inl.h"
 
@@ skipping 19 matching lines @@
                  LocationField::encode(VariableLocation::UNALLOCATED) |
                  VariableKindField::encode(kind)) {
   // Var declared variables never need initialization.
   DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
 }
 
 
 bool Variable::IsGlobalObjectProperty() const {
   // Temporaries are never global, they must always be allocated in the
   // activation frame.
-  return (IsDynamicVariableMode(mode()) ||
-          (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode()))) &&
-         scope_ != NULL && scope_->is_script_scope();
+  return (IsDynamicVariableMode(mode()) || mode() == VAR) &&
+         scope_ != nullptr && scope_->is_script_scope();
 }
 
 }  // namespace internal
 }  // namespace v8