[ReactNative] cleanup native components

Libraries/ReactIOS/verifyPropTypes.js

@@ -14,16 +14,24 @@
 var ReactNativeStyleAttributes = require('ReactNativeStyleAttributes');
 var View = require('View');
 
+export type ComponentInterface = ReactClass<any, any, any> | {
+  name?: string;
+  displayName?: string;
+  propTypes: Object;
+};
+
 function verifyPropTypes(
-  component: Function,
+  componentInterface: ComponentInterface,
   viewConfig: Object,
-  nativePropsToIgnore?: Object
+  nativePropsToIgnore?: ?Object
 ) {
   if (!viewConfig) {
     return; // This happens for UnimplementedView.
   }
-  var componentName = component.name || component.displayName;
-  if (!component.propTypes) {
+  var componentName = componentInterface.name ||
+    componentInterface.displayName ||
+    'unknown';
+  if (!componentInterface.propTypes) {
     throw new Error(
       '`' + componentName + '` has no propTypes defined`'
     );
@@ -31,7 +39,7 @@ function verifyPropTypes(
 
   var nativeProps = viewConfig.NativeProps;
   for (var prop in nativeProps) {
-    if (!component.propTypes[prop] &&
+    if (!componentInterface.propTypes[prop] &&
         !View.propTypes[prop] &&
         !ReactNativeStyleAttributes[prop] &&
         (!nativePropsToIgnore || !nativePropsToIgnore[prop])) {