Reintroduce duplicate identifier detection in preparser.

src/preparser-api.cc

 // 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
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 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+#ifdef _MSC_VER
+#define V8_WIN32_LEAN_AND_MEAN
+#include "win32-headers.h"
+#endif
+
 #include "../include/v8-preparser.h"
 
 #include "globals.h"
-#include "flags.h"
 #include "checks.h"
 #include "allocation.h"
 #include "utils.h"
 #include "list.h"
+#include "hashmap.h"
 #include "scanner-base.h"
 #include "preparse-data-format.h"
 #include "preparse-data.h"
 #include "preparser.h"
 
 namespace v8 {
 namespace internal {
 
 // UTF16Buffer based on a v8::UnicodeInputStream.
 class InputStreamUTF16Buffer : public UC16CharacterStream {
@@ skipping 149 matching lines @@
   return PreParserData(size, data);
 }
 
 }  // namespace v8.
 
 
 // Used by ASSERT macros and other immediate exits.
 extern "C" void V8_Fatal(const char* file, int line, const char* format, ...) {
   exit(EXIT_FAILURE);
 }