[ast] Simplify a condition.

src/ast/variables.cc

Index: src/ast/variables.cc
diff --git a/src/ast/variables.cc b/src/ast/variables.cc
index f138727177d93fd49f0d2ceb37ce5668785738af..cd1d8f77b712eeab6058faacb19c285513453508 100644
--- a/src/ast/variables.cc
+++ b/src/ast/variables.cc
@@ -37,9 +37,8 @@ Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
 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