Implement mocks for identity and host-list, add a browser test to test the app in various failure m…

chrome/test/remoting/remote_desktop_browsertest.h

Index: chrome/test/remoting/remote_desktop_browsertest.h
diff --git a/chrome/test/remoting/remote_desktop_browsertest.h b/chrome/test/remoting/remote_desktop_browsertest.h
index 7ec09817c82b90a1f644b3595142b52d4d2cb76a..0f9a9a416cda3493b21138a8c524774db183f278 100644
--- a/chrome/test/remoting/remote_desktop_browsertest.h
+++ b/chrome/test/remoting/remote_desktop_browsertest.h
@@ -143,6 +143,10 @@ class RemoteDesktopBrowserTest : public extensions::PlatformAppBrowserTest {
   // Install the chromoting extension
   void Install();
 
+  // Load the browser-test support JavaScript files, including helper functions
+  // and mocks.
+  void LoadBrowserTestJavaScript(content::WebContents* content);
+
   // Perform all necessary steps (installation, authorization, authentication,
   // expanding the me2me section) so that the app is ready for a me2me
   // connection.