Add InvokeApiCallbackInterrupt runtime counter

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 1b96583cb093cd44eb2022945e59b2a6bc185322..065a88a9fba4ef53780cd8958c628987bbfb064f 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -979,6 +979,8 @@ void Isolate::RequestInterrupt(InterruptCallback callback, void* data) {
 
 
 void Isolate::InvokeApiInterruptCallbacks() {
+  RuntimeCallTimerScope runtimeTimer(
+      this, &RuntimeCallStats::InvokeApiInterruptCallbacks);
   // Note: callback below should be called outside of execution access lock.
   while (true) {
     InterruptEntry entry;