Math.abs rewrited to not use Runtime.

src/runtime.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
@@ skipping 114 matching lines @@
   \
   /* Comparisons */ \
   F(NumberEquals, 2, 1) \
   F(StringEquals, 2, 1) \
   \
   F(NumberCompare, 3, 1) \
   F(SmiLexicographicCompare, 2, 1) \
   F(StringCompare, 2, 1) \
   \
   /* Math */ \
-  F(Math_abs, 1, 1) \
   F(Math_acos, 1, 1) \
   F(Math_asin, 1, 1) \
   F(Math_atan, 1, 1) \
   F(Math_atan2, 2, 1) \
   F(Math_ceil, 1, 1) \
   F(Math_cos, 1, 1) \
   F(Math_exp, 1, 1) \
   F(Math_floor, 1, 1) \
   F(Math_log, 1, 1) \
   F(Math_pow, 2, 1) \
@@ skipping 287 matching lines @@
                                                 int position);
 
   // Helper functions used stubs.
   static void PerformGC(Object* result);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_