Remove unused variable from Scanner class.

BUG=None
TEST=compiles

Patch from Thiago Farina <tfarina@chromium.org>

Review URL: http://codereview.chromium.org/3413015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5490 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.cc

@@ -1457,7 +1457,7 @@ Parser::Parser(Handle<Script> script,
                ParserLog* log,
                ScriptDataImpl* pre_data)
     : script_(script),
-      scanner_(is_pre_parsing),
+      scanner_(),
       top_scope_(NULL),
       with_nesting_level_(0),
       temp_scope_(NULL),

src/scanner.cc

-// 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,

src/scanner.h

-// 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:
@@ -281,8 +281,7 @@ class Scanner {
     bool complete_;
   };
 
-  // Construction
-  explicit Scanner(ParserMode parse_mode);
+  Scanner();
 
   // Initialize the Scanner to scan source.
   void Initialize(Handle<String> source,
@@ -488,7 +487,6 @@ class Scanner {
   TokenDesc current_;  // desc for current token (as returned by Next())
   TokenDesc next_;     // desc for next token (one token look-ahead)
   bool has_line_terminator_before_next_;
-  bool is_pre_parsing_;
   bool is_parsing_json_;
 
   // Different UTF16 buffers used to pull characters from. Based on input one of