Merge up to 8597 to experimental/gc from the bleeding edge.

test/mjsunit/compiler/inline-arguments.js

 // 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 17 matching lines @@
 // Flags: --allow-natives-syntax
 
 // Test inlining functions that use arguments.
 function f() { return g(1, 2, 3); }
 
 function g(x, y, z) { return %_ArgumentsLength(); }
 
 for (var i = 0; i < 5; ++i) f();
 %OptimizeFunctionOnNextCall(f);
 assertEquals(3, f());