Added more methods for chrome.bluetooth

Author: Ke, Mingze

lib/chrome.bluetooth.js

@@ -5,8 +5,11 @@ chrome.bluetooth = chrome.bluetooth || (function (_api) {
   var proxyRequest = _api.proxyRequest;
 
   return {
+    getAdapterState: proxyRequest('chrome.bluetooth.getAdapterState'),
     getDevice: proxyRequest('chrome.bluetooth.getDevice'),
-    getDevices: proxyRequest('chrome.bluetooth.getDevices')
+    getDevices: proxyRequest('chrome.bluetooth.getDevices'),
+    startDiscovery: proxyRequest('chrome.bluetooth.startDiscovery'),
+    stopDiscovery: proxyRequest('chrome.bluetooth.stopDiscovery')
   };
 
 }(chrome._api));