Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

test/mjsunit/compiler/deopt-args.js

Index: test/mjsunit/compiler/deopt-args.js
diff --git a/test/mjsunit/compiler/deopt-args.js b/test/mjsunit/compiler/deopt-args.js
index 780e2a24a0a204ef106520173a2153dfb4e9644c..17c397c1525a7b7cd5790d3918a337438af3d93e 100644
--- a/test/mjsunit/compiler/deopt-args.js
+++ b/test/mjsunit/compiler/deopt-args.js
@@ -25,6 +25,8 @@
 // (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
+
 function g(x) {
   return x.f(0,1,2);
 }
@@ -35,9 +37,11 @@ function f(a,b,c) {
 
 var object = { };
 object.f = f;
-for (var i = 0; i < 10000000; i++) {
+for (var i = 0; i < 5; i++) {
   assertEquals(42, g(object));
 }
+%OptimizeFunctionOnNextCall(g);
+g(object);
 
 object.f = function(a,b,c) { return 87; };
 assertEquals(87, g(object));