LiveEdit: calculate a real script difference

src/handles.h

 // Copyright 2006-2008 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
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 Handle<FixedArray> AddKeysFromJSArray(Handle<FixedArray>,
                                       Handle<JSArray> array);
 
 // Get the JS object corresponding to the given script; create it
 // if none exists.
 Handle<JSValue> GetScriptWrapper(Handle<Script> script);
 
 // Script line number computations.
 void InitScriptLineEnds(Handle<Script> script);
+// For string calculates an array of line end positions. If the string
+// does not end with a new line character, this character may optionally be
+// imagined.
+Handle<FixedArray> CalculateLineEnds(Handle<String> string,
+                                     bool with_imaginary_last_new_line);
 int GetScriptLineNumber(Handle<Script> script, int code_position);
 // The safe version does not make heap allocations but may work much slower.
 int GetScriptLineNumberSafe(Handle<Script> script, int code_position);
 
 // Computes the enumerable keys from interceptors. Used for debug mirrors and
 // by GetKeysInFixedArrayFor below.
 v8::Handle<v8::Array> GetKeysForNamedInterceptor(Handle<JSObject> receiver,
                                                  Handle<JSObject> object);
 v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSObject> receiver,
                                                    Handle<JSObject> object);
@@ skipping 87 matching lines @@
  private:
   bool has_been_transformed_;  // Tells whether the object has been transformed.
   int unused_property_fields_;  // Captures the unused number of field.
   Handle<JSObject> object_;    // The object being optimized.
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_H_