Avoid conflict between method and type name.

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index 241d81a01a00f4edf95887aa48a6c625babc916b..2a2a49a0fb475e13cb3d213893c64b7ef78fe500 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -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:
@@ -124,7 +124,7 @@ class PreParser {
       return Expression(kUnknownExpression);
     }
 
-    static Expression Identifier(Identifier id) {
+    static Expression FromIdentifier(Identifier id) {
       return Expression(kIdentifierFlag | (id.type_ << kIdentifierShift));
     }