Added Flow types for React Native host components

Reviewed By: calebmer

Differential Revision: D5844473

fbshipit-source-id: 2893e5a5ee58d147a2f7d351143a7ce0eb8eebe3

Libraries/Components/View/View.js.flow

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule View
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+const {NativeComponent} = require('ReactNative');
+
+import type {ViewProps} from 'ViewPropTypes';
+
+export type Props = ViewProps;
+
+/**
+ * Host components in React 16 are represented by strings (eg "div", "View").
+ * This is inconvenient for users who want to type a ref (eg `ref: View`).
+ * The following type isn't sound but it enables consistent Flow types
+ * for various default React Native components, so it seems a good tradeoff.
+ */
+declare class View extends NativeComponent<void, ViewProps> {}
+
+module.exports = View;