Compose propTypes from View.propTypes where appropriate.

Reviewed By: davidaurelio

Differential Revision: D2668380

fb-gh-sync-id: f34fc8df3bbf755c710e99c5421762406afaba2c

Libraries/Components/WebView/WebView.ios.js

@@ -88,6 +88,7 @@ var WebView = React.createClass({
   },
 
   propTypes: {
+    ...View.propTypes,
     url: PropTypes.string,
     html: PropTypes.string,
     renderError: PropTypes.func, // view to show if there's an error