Remove navigator.geolocation, use Geolocation

Summary: This is the first diff in an effort to remove Geolocation from React Native. This diff removes the globally injected navigator.geolocation feature and instead requires explicit importing of `Geolocation`. When using Web APIs, people will need to patch `navigator.geolocation` on their own from now on.

Reviewed By: sahrens

Differential Revision: D14692386

fbshipit-source-id: c57b290b49728101250d726d67b1956ff23a9a92

RNTester/js/GeolocationExample.js

@@ -10,6 +10,7 @@
 
 'use strict';
 
+import Geolocation from 'Geolocation';
 const React = require('react');
 const ReactNative = require('react-native');
 const {StyleSheet, Text, View, Alert} = ReactNative;
@@ -23,7 +24,7 @@ class GeolocationExample extends React.Component<{}, $FlowFixMeState> {
   watchID: ?number = null;
 
   componentDidMount() {
-    navigator.geolocation.getCurrentPosition(
+    Geolocation.getCurrentPosition(
       position => {
         const initialPosition = JSON.stringify(position);
         this.setState({initialPosition});
@@ -31,14 +32,14 @@ class GeolocationExample extends React.Component<{}, $FlowFixMeState> {
       error => Alert.alert('Error', JSON.stringify(error)),
       {enableHighAccuracy: true, timeout: 20000, maximumAge: 1000},
     );
-    this.watchID = navigator.geolocation.watchPosition(position => {
+    this.watchID = Geolocation.watchPosition(position => {
       const lastPosition = JSON.stringify(position);
       this.setState({lastPosition});
     });
   }
 
   componentWillUnmount() {
-    this.watchID != null && navigator.geolocation.clearWatch(this.watchID);
+    this.watchID != null && Geolocation.clearWatch(this.watchID);
   }
 
   render() {
@@ -69,7 +70,7 @@ exports.description = 'Examples of using the Geolocation API.';
 
 exports.examples = [
   {
-    title: 'navigator.geolocation',
+    title: 'Geolocation',
     render: function(): React.Element<any> {
       return <GeolocationExample />;
     },