Adding embedder API function Dart_FinalizeLoading

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
===================================================================
--- runtime/vm/dart_api_impl.cc	(revision 37402)
+++ runtime/vm/dart_api_impl.cc	(working copy)
@@ -5106,6 +5106,37 @@
 }
 
 
+// Finalizes classes and invokes Dart core library function that completes
+// futures of loadLibrary calls (deferred library loading).
+DART_EXPORT Dart_Handle Dart_FinalizeLoading() {
+  Isolate* isolate = Isolate::Current();
+  DARTSCOPE(isolate);
+  CHECK_CALLBACK_STATE(isolate);
+
+  // Finalize all classes if needed.
+  Dart_Handle state = Api::CheckIsolateState(isolate);
+  if (::Dart_IsError(state)) {
+    return state;
+  }
+
+  const Library& corelib = Library::Handle(isolate, Library::CoreLibrary());
+  const String& function_name =
+      String::Handle(isolate, String::New("_completeDeferredLoads"));
+  const Function& function =
+      Function::Handle(isolate,
+                       corelib.LookupFunctionAllowPrivate(function_name));
+  ASSERT(!function.IsNull());
+  const Array& args = Array::empty_array();
+
+  const Object& res =
+      Object::Handle(isolate, DartEntry::InvokeFunction(function, args));
+  if (res.IsError() || res.IsUnhandledException()) {
+    return Api::NewHandle(isolate, res.raw());
+  }
+  return Api::Success();
+}
+
+
 DART_EXPORT Dart_Handle Dart_SetNativeResolver(
     Dart_Handle library,
     Dart_NativeEntryResolver resolver,