Split StringLiteral from Literal.

src/prettyprinter.cc

Index: src/prettyprinter.cc
diff --git a/src/prettyprinter.cc b/src/prettyprinter.cc
index 233d7c2fabeeb21567e4124cb0ef19a34b9c6f2e..1ff7356cafcb1863f7b910d4ebf9428231c79eec 100644
--- a/src/prettyprinter.cc
+++ b/src/prettyprinter.cc
@@ -309,6 +309,16 @@ void PrettyPrinter::VisitLiteral(Literal* node) {
 }
 
 
+void PrettyPrinter::VisitStringLiteral(StringLiteral* node) {
+  VisitLiteral(node);
+}
+
+
+void PrettyPrinter::VisitNumberLiteral(NumberLiteral* node) {
+  VisitLiteral(node);
+}
+
+
 void PrettyPrinter::VisitRegExpLiteral(RegExpLiteral* node) {
   Print(" RegExp(");
   PrintLiteral(node->pattern(), false);
@@ -368,8 +378,8 @@ void PrettyPrinter::VisitThrow(Throw* node) {
 
 void PrettyPrinter::VisitProperty(Property* node) {
   Expression* key = node->key();
-  Literal* literal = key->AsLiteral();
-  if (literal != NULL && literal->value()->IsInternalizedString()) {
+  StringLiteral* literal = key->AsStringLiteral();
+  if (literal != NULL) {
     Print("(");
     Visit(node->obj());
     Print(").");
@@ -978,6 +988,16 @@ void AstPrinter::VisitLiteral(Literal* node) {
 }
 
 
+void AstPrinter::VisitStringLiteral(StringLiteral* node) {
+  VisitLiteral(node);
+}
+
+
+void AstPrinter::VisitNumberLiteral(NumberLiteral* node) {
+  VisitLiteral(node);
+}
+
+
 void AstPrinter::VisitRegExpLiteral(RegExpLiteral* node) {
   IndentedScope indent(this, "REGEXP LITERAL");
   PrintLiteralIndented("PATTERN", node->pattern(), false);
@@ -1076,8 +1096,8 @@ void AstPrinter::VisitThrow(Throw* node) {
 void AstPrinter::VisitProperty(Property* node) {
   IndentedScope indent(this, "PROPERTY");
   Visit(node->obj());
-  Literal* literal = node->key()->AsLiteral();
-  if (literal != NULL && literal->value()->IsInternalizedString()) {
+  StringLiteral* literal = node->key()->AsStringLiteral();
+  if (literal != NULL) {
     PrintLiteralIndented("NAME", literal->value(), false);
   } else {
     PrintIndentedVisit("KEY", node->key());