Reland and fix "Add support for keyed-call on arrays of fast elements"

test/mjsunit/keyed-array-call.js

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-'use strict';
-
-// ES6 draft 09-27-13, section 20.2.2.28.
-function MathSign(x) {
-  x = TO_NUMBER_INLINE(x);
-  if (x > 0) return 1;
-  if (x < 0) return -1;
-  if (x === 0) return x;
-  return NAN;
+var a = [function(a) { return a+10; },
+         function(a) { return a+20; }];
+a.__proto__.test = function(a) { return a+30; }
+function f(i) {
+  return "r" + (1, a[i](i+1), a[i](i+2));
 }
 
+assertEquals("r12", f(0));
+assertEquals("r12", f(0));
+assertEquals("r23", f(1));
+assertEquals("r23", f(1));
 
-// ES6 draft 09-27-13, section 20.2.2.34.
-function MathTrunc(x) {
-  x = TO_NUMBER_INLINE(x);
-  if (x > 0) return MathFloor(x);
-  if (x < 0) return MathCeil(x);
-  if (x === 0) return x;
-  return NAN;
+// Deopt the stub.
+assertEquals("rtest230", f("test"));
+
+var a2 = [function(a) { return a+10; },,
+          function(a) { return a+20; }];
+a2.__proto__.test = function(a) { return a+30; }
+function f2(i) {
+  return "r" + (1, a2[i](i+1), a2[i](i+2));
 }
 
+assertEquals("r12", f2(0));
+assertEquals("r12", f2(0));
+assertEquals("r24", f2(2));
+assertEquals("r24", f2(2));
 
-function ExtendMath() {
-  %CheckIsBootstrapping();
-
-  // Set up the non-enumerable functions on the Math object.
-  InstallFunctions($Math, DONT_ENUM, $Array(
-    "sign", MathSign,
-    "trunc", MathTrunc
-  ));
-}
-
-ExtendMath();
+// Deopt the stub. This will throw given that undefined is not a function.
+assertThrows(function() { f2(1) });