Wrap native module I18nManager with a new RCTI18nManager.js and fix current use of native module I18nManager

Summary: create new RCTI18nManager.js to warp-up native module I18nManager and fix current use of it.

Reviewed By: ericvicenti

Differential Revision: D3547427

fbshipit-source-id: 53a695c94ca6bba2f566d0725c553e58d60bf451

Libraries/CustomComponents/Navigator/NavigatorSceneConfigs.js

@@ -33,10 +33,10 @@
 
 var Dimensions = require('Dimensions');
 var PixelRatio = require('PixelRatio');
+var I18nManager = require('I18nManager');
 
 var buildStyleInterpolator = require('buildStyleInterpolator');
 
-var I18nManager = require('NativeModules').I18nManager || {};
 var IS_RTL = I18nManager.isRTL;
 
 var SCREEN_WIDTH = Dimensions.get('window').width;

Libraries/Experimental/SwipeableRow/SwipeableRow.js

@@ -25,6 +25,7 @@
 
 const Animated = require('Animated');
 const PanResponder = require('PanResponder');
+const I18nManager = require('I18nManager');
 const React = require('React');
 const StyleSheet = require('StyleSheet');
 const TimerMixin = require('react-timer-mixin');
@@ -34,7 +35,6 @@ const {PropTypes} = React;
 
 const emptyFunction = require('fbjs/lib/emptyFunction');
 
-const I18nManager = require('NativeModules').I18nManager || {};
 const IS_RTL = I18nManager.isRTL;
 
 // NOTE: Eventually convert these consts to an input object of configurations
@@ -308,7 +308,9 @@ const SwipeableRow = React.createClass({
      * When swiping right, we want to bounce back past closed position on release
      * so users know they should swipe right to get content.
      */
-    const swipeBounceBackDistance = IS_RTL ? -RIGHT_SWIPE_BOUNCE_BACK_DISTANCE : RIGHT_SWIPE_BOUNCE_BACK_DISTANCE;
+    const swipeBounceBackDistance = IS_RTL ?
+      -RIGHT_SWIPE_BOUNCE_BACK_DISTANCE :
+      RIGHT_SWIPE_BOUNCE_BACK_DISTANCE;
     this._animateTo(
       -swipeBounceBackDistance,
       duration,

Libraries/Utilities/I18nManager.js

@@ -0,0 +1,24 @@
+/**
+ * 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 I18nManager
+ * @flow
+ */
+'use strict';
+
+type I18nManagerStatus = {
+  isRTL: boolean,
+  allowRTL: (allowRTL: boolean) => {},
+};
+
+const I18nManager : I18nManagerStatus = require('NativeModules').I18nManager || {
+  isRTL: false,
+  allowRTL: () => {},
+};
+
+module.exports = I18nManager;