Complete missing bits of Google OAuth2 provider

Summary: Added support for profile images and URLs.

Test Plan: Looked at /settings/panel/oauth-google/, refreshed profile picture, click profile URL, saw correct profile.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4556

src/applications/auth/oauth/provider/PhabricatorOAuthProviderGoogle.php

@@ -95,13 +95,15 @@ final class PhabricatorOAuthProviderGoogle extends PhabricatorOAuthProvider {
   }
 
   public function retrieveUserProfileImage() {
-    // No apparent API access to Plus yet.
+    $uri = idx($this->userData, 'picture');
+    if ($uri) {
+      return HTTPSFuture::loadContent($uri);
+    }
     return null;
   }
 
   public function retrieveUserAccountURI() {
-    // No apparent API access to Plus yet.
-    return null;
+    return 'https://plus.google.com/'.$this->userData['id'];
   }
 
   public function retrieveUserRealName() {