[ReactNative] Use oss TimerMixin

Examples/Movies/SearchScreen.js

@@ -18,9 +18,9 @@ var {
   StyleSheet,
   Text,
   TextInput,
-  TimerMixin,
   View,
 } = React;
+var TimerMixin = require('react-timer-mixin');
 
 var MovieCell = require('./MovieCell');
 var MovieScreen = require('./MovieScreen');

Examples/UIExplorer/ActivityIndicatorExample.js

@@ -14,9 +14,9 @@ var React = require('react-native');
 var {
   ActivityIndicatorIOS,
   StyleSheet,
-  TimerMixin,
   View,
 } = React;
+var TimerMixin = require('react-timer-mixin');
 
 var ToggleAnimatingActivityIndicator = React.createClass({
   mixins: [TimerMixin],

Examples/UIExplorer/TimerExample.js

@@ -15,10 +15,10 @@ var {
   AlertIOS,
   StyleSheet,
   Text,
-  TimerMixin,
   TouchableHighlight,
   View,
 } = React;
+var TimerMixin = require('react-timer-mixin');
 
 var Button = React.createClass({
   render: function() {