Add memory pressure interrupt for memory pressure notification

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index a784619d6fb3a4be19baff4da3389ed40fe9caff..18a76d0573e51f5876c251f6ad8d8780f03bea14 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -953,6 +953,12 @@ void Isolate::InvokeApiInterruptCallbacks() {
   }
 }
 
+void Isolate::RequestMemoryPressureInterrupt(
+    v8::Isolate::MemoryPressureLevel level) {
+  ExecutionAccess access(this);
+  memory_pressure_level_ = level;
+  stack_guard()->RequestMemoryPressureInterrupt();
+}
 
 void ReportBootstrappingException(Handle<Object> exception,
                                   MessageLocation* location) {