Implement ES6 Template Literals

src/ast-value-factory.cc

Index: src/ast-value-factory.cc
diff --git a/src/ast-value-factory.cc b/src/ast-value-factory.cc
index 0a1949a69cc2b05756aa1939e1d947ebffae2b12..84ec6a2e869fd52dd0d882f99886b6b28636efcd 100644
--- a/src/ast-value-factory.cc
+++ b/src/ast-value-factory.cc
@@ -271,6 +271,13 @@ const AstConsString* AstValueFactory::NewConsString(
 }
 
 
+const AstTemplateSpan* AstValueFactory::NewTemplateSpan(
+    const AstString* value, const AstString* rawValue) {
+  AstTemplateSpan* new_span = new (zone_) AstTemplateSpan(value, rawValue);
+  return new_span;
+}
+
+
 void AstValueFactory::Internalize(Isolate* isolate) {
   if (isolate_) {
     // Everything is already internalized.