Speed up some mjsunit test cases and clean up test expectations for arm and mips.

test/mjsunit/compiler/regress-arguments.js

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+// Flags: --allow-natives-syntax
+
 // Test of arguments.
 
 // Test passing null or undefined as receiver.
 function f() { return this.foo; }
 
 function g() { return f.apply(null, arguments); }
 function h() { return f.apply(void 0, arguments); }
 
 var foo = 42;
 
-for (var i=0; i<1000000; i++) assertEquals(42, g());
-for (var i=0; i<1000000; i++) assertEquals(42, h());
+for (var i = 0; i < 3; i++) assertEquals(42, g());
+%OptimizeFunctionOnNextCall(g);
+%OptimizeFunctionOnNextCall(f);
+assertEquals(42, g());
+
+for (var i = 0; i < 3; i++) assertEquals(42, h());
+%OptimizeFunctionOnNextCall(h);
+%OptimizeFunctionOnNextCall(f);
+assertEquals(42, h());
 
 var G1 = 21;
 var G2 = 22;
 
 function u() {
  var v = G1 + G2;
  return f.apply(v, arguments);
 }
 
 Number.prototype.foo = 42;
 delete Number.prototype.foo;
 
-for (var i=0; i<100000; i++) assertEquals(void 0, u());
+for (var i = 0; i < 3; i++) assertEquals(void 0, u());
+%OptimizeFunctionOnNextCall(u);
+%OptimizeFunctionOnNextCall(f);
+assertEquals(void 0, u());