Change userinfo endpoint to the JSON one.

remoting/webapp/oauth2.js

Index: remoting/webapp/oauth2.js
diff --git a/remoting/webapp/oauth2.js b/remoting/webapp/oauth2.js
index 9956f5a026edb30fca3157283517fe91aa7515f2..7ec220833ef6bfc39b5f8c65f387473f1c1705ef 100644
--- a/remoting/webapp/oauth2.js
+++ b/remoting/webapp/oauth2.js
@@ -492,10 +492,10 @@ remoting.OAuth2.prototype.getEmail = function(onOk, onError) {
   var onResponse = function(xhr) {
     var email = null;
     if (xhr.status == 200) {
-      // TODO(ajwong): See if we can't find a JSON endpoint.
-      email = xhr.responseText.split('&')[0].split('=')[1];
-      window.localStorage.setItem(that.KEY_EMAIL_, email);
-      onOk(email);
+      var result =
+        /** @type {{email: string}} */ (jsonParseSafe(xhr.responseText));
+      window.localStorage.setItem(that.KEY_EMAIL_, result.email);
+      onOk(result.email);

[Jamie, 2013/01/09 18:51:09]

I think we could benefit from some sanity-checking code here to make sure that
there is an email member, and perhaps pass ERROR_UNEXPECTED to onError if not.

[rmsousa, 2013/01/09 20:34:39]

Done.

       return;
     }
     console.error('Unable to get email address:', xhr.status, xhr);
@@ -509,8 +509,7 @@ remoting.OAuth2.prototype.getEmail = function(onOk, onError) {
   /** @param {string} token The access token. */
   var getEmailFromToken = function(token) {
     var headers = { 'Authorization': 'OAuth ' + token };
-    // TODO(ajwong): Update to new v2 API.
-    remoting.xhr.get('https://www.googleapis.com/userinfo/email',
+    remoting.xhr.get('https://www.googleapis.com/oauth2/v1/userinfo',
                      onResponse, '', headers);
   };