Fix f.apply() optimization when declared arguments are mutated.

test/mjsunit/regress/regress-2539.js

 // Copyright 2013 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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax
 
 "use strict";
+var dispatcher = {};
+dispatcher.func = C;
 
-function f(a, b) {
-  return g("c", "d");
+function A() {
+  B(10, 11);
 }
 
-function g(a, b) {
-  g.constructor.apply(this, arguments);
+function B(x,y) {
+  x = 0; y = 0;
+  dispatcher.func.apply(this, arguments);
+  assertSame(2, arguments.length);
+  assertSame(10, arguments[0]);
+  assertSame(11, arguments[1]);
 }
 
-g.constructor = function(a, b) {
-  assertEquals("c", a);
-  assertEquals("d", b);
+function C(x,y) {
+  assertSame(2, arguments.length);
+  assertSame(10, arguments[0]);
+  assertSame(11, arguments[1]);
 }
 
-f("a", "b");
-f("a", "b");
-%OptimizeFunctionOnNextCall(f);
-f("a", "b");
-g.x = "deopt";
-f("a", "b");
+A();
+A();
+%OptimizeFunctionOnNextCall(A);
+A();