Make the preparser standalone library and process build in debug mode.

src/scanner.cc

 // 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 327 matching lines @@
   // after a newline and scan first token.
   has_line_terminator_before_next_ = true;
   SkipWhiteSpace();
   Scan();
 }
 
 
 // ----------------------------------------------------------------------------
 // JsonScanner
 
-JsonScanner::JsonScanner(Isolate* isolate) : Scanner(isolate) { }
+JsonScanner::JsonScanner(ScannerConstants* scanner_constants)
+    : Scanner(scanner_constants) { }
 
 
 void JsonScanner::Initialize(UC16CharacterStream* source) {
   source_ = source;
   Init();
   // Skip initial whitespace.
   SkipJsonWhiteSpace();
   // Preload first token as look-ahead.
   ScanJson();
 }
@@ skipping 215 matching lines @@
     Advance();
     text++;
   }
   if (scanner_constants_->IsIdentifierPart(c0_)) return Token::ILLEGAL;
   literal.Complete();
   return token;
 }
 
 
 } }  // namespace v8::internal