Fix Auth browser-test failure: make sure element is ready to receive click.

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 e5659945c958f78196e17b04a7d74e32063e5ac0..e4a025ec53d95f545635813d9c5f0ab3e7451e8d 100644
--- a/chrome/test/remoting/remote_desktop_browsertest.h
+++ b/chrome/test/remoting/remote_desktop_browsertest.h
@@ -314,6 +314,11 @@ class RemoteDesktopBrowserTest : public extensions::PlatformAppBrowserTest {
       return IsAuthenticatedInWindow(active_web_contents());
   }
 
+  // Callback used by Approve to check whether the Accept button is enabled
+  // and ready to receive a click.
+  static bool IsEnabled(
+      content::WebContents* web_contents, const std::string& name);
+
   // If the "Host version out-of-date" form is visible, dismiss it.
   void DismissHostVersionWarningIfVisible();