Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index c7ff3a392b27748ddf4ae9231f24ff76ea33fed0..8e5e3536028219e8edca9d33e97cc0b7020a42d5 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -7405,6 +7405,16 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeoptimizeFunction) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_OptimizeFunctionOnNextCall) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(JSFunction, function, 0);
+  if (!function->IsOptimizable()) return isolate->heap()->undefined_value();
+  function->MarkForLazyRecompilation();
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);