Never clear debug-stub call ICs. Make a clear distinction between is_debug_stub

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 057e268f7ad0e6ec9f830b449b7963a5eda30934..6311f4b0cb44ad5467947669094b65986cfdd4ff 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -14153,6 +14153,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FlattenString) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_NotifyContextDisposed) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 0);
+  isolate->heap()->NotifyContextDisposed();
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_MigrateInstance) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);