Avoid conflict between method and type name.

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index eaadb58915425f755e1cefc57e7681dd9ade900e..3c48d14bab72835ac7ffefb2c02afb6801e0b162 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -981,7 +981,7 @@ PreParser::Expression PreParser::ParsePrimaryExpression(bool* ok) {
       // FALLTHROUGH
     case i::Token::IDENTIFIER: {
       Identifier id = ParseIdentifier(CHECK_OK);
-      result = Expression::Identifier(id);
+      result = Expression::FromIdentifier(id);
       break;
     }