[cros] Add comments for login WebUI related notifications.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 924 matching lines @@
     // Do this only once. Any subsequent call would relod GAIA frame.
     focus_stolen_ = false;
     const char code[] = "gWindowOnLoad();";
     RenderViewHost* rvh = web_ui()->GetWebContents()->GetRenderViewHost();
     rvh->ExecuteJavascriptInWebFrame(
         ASCIIToUTF16("//iframe[@id='signin-frame']\n//iframe"),
         ASCIIToUTF16(code));
   }
   if (!gaia_silent_load_) {
     content::NotificationService::current()->Notify(
-        chrome::NOTIFICATION_LOGIN_WEBUI_READY,
+        chrome::NOTIFICATION_LOGIN_WEBUI_LOADED,
         content::NotificationService::AllSources(),
         content::NotificationService::NoDetails());
   } else {
     focus_stolen_ = true;
     // Prevent focus stealing by the Gaia page.
     // TODO(altimofeev): temporary solution, until focus parameters are
     // implemented on the Gaia side.
     const char code[] = "var gWindowOnLoad = window.onload; "
                         "window.onload=function() {};";
     RenderViewHost* rvh = web_ui()->GetWebContents()->GetRenderViewHost();
@@ skipping 111 matching lines @@
       !dns_clear_task_running_ &&
       network_state_informer_->is_online()) {
     gaia_silent_load_ = true;
     gaia_silent_load_network_ =
         network_state_informer_->active_network_service_path();
     LoadAuthExtension(true, true, false);
   }
 }
 
 }  // namespace chromeos