Remove unused variable from Scanner class.

src/scanner.cc

Index: src/scanner.cc
diff --git a/src/scanner.cc b/src/scanner.cc
index 15b1d44203e5c897c7b33591f8dd9f6576464a07..79d63f1774dceaceceec1eccb19aebb218bb3a34 100755
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2010 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:
@@ -342,8 +342,11 @@ void Scanner::LiteralScope::Complete() {
 // ----------------------------------------------------------------------------
 // Scanner
 
-Scanner::Scanner(ParserMode pre)
-    : is_pre_parsing_(pre == PREPARSE), stack_overflow_(false) { }
+Scanner::Scanner()
+    : has_line_terminator_before_next_(false),
+      is_parsing_json_(false),
+      source_(NULL),
+      stack_overflow_(false) {}
 
 
 void Scanner::Initialize(Handle<String> source,