Fix broken Variable::IsGlobalObjectProperty() after https://codereview.chromium.org/1218783005

Review URL: https://codereview.chromium.org/1228373011

Cr-Commit-Position: refs/heads/master@{#29682}

src/variables.cc

@@ -58,7 +58,9 @@ 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_) || IsStaticGlobalObjectProperty();
+  return (IsDynamicVariableMode(mode_) ||
+          (IsDeclaredVariableMode(mode_) && !IsLexicalVariableMode(mode_))) &&
+         scope_ != NULL && scope_->is_script_scope() && !is_this();
 }