Represent implicit 'this' binding by 'super' in AST.

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index 93cb6c09b99358f6a118f58e83442ef01f58e832..de229cb014ea36ad65f0f8d927646659a183d30e 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -59,6 +59,11 @@ bool Expression::IsUndefinedLiteral(Isolate* isolate) const {
 }
 
 
+bool Expression::IsVariableProxyOrProperty() const {

[rossberg, 2015/07/16 11:50:48]

I have a slight preference for

IsValidReferenceExpressionOrThis() = IsValidReferenceExpression() || IsThis()

but I'd be fine with the current version as well.

[Michael Starzinger, 2015/07/16 12:46:19]

Done. Your slight preference is my command.

+  return IsVariableProxy() || IsProperty();
+}
+
+
 VariableProxy::VariableProxy(Zone* zone, Variable* var, int start_position,
                              int end_position)
     : Expression(zone, start_position),