Extract string->double and double->string conversions for use in the preparser.

src/liveobjectlist.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.
 //     * 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 2567 matching lines @@
                 i++, heap_obj, Heap::new_space()->FromSpaceLow());
     }
   }
 }
 #endif  // VERIFY_LOL
 
 
 } }  // namespace v8::internal
 
 #endif  // LIVE_OBJECT_LIST
-