Remove enable Drive offline system tray UI.

chrome/browser/chromeos/first_run/drive_first_run_controller.cc

 // Copyright 2013 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/chromeos/first_run/drive_first_run_controller.h"
 
-#include "ash/shell.h"
-#include "ash/system/tray/system_tray_notifier.h"
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
@@ skipping 352 matching lines @@
 void DriveFirstRunController::CleanUp() {
   if (web_contents_manager_)
     web_contents_manager_->StopLoad();
   web_contents_timer_.Stop();
   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }
 
 void DriveFirstRunController::OnOfflineInit(bool success) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (success) {
-    ash::Shell::GetInstance()->system_tray_notifier()
-        ->NotifyDriveOfflineEnabled();
+    // TODO(tengs): Show non-toast notification that offline files will now
+    // be synced.
   }
   FOR_EACH_OBSERVER(Observer, observer_list_, OnCompletion(success));
   CleanUp();
 }
 
 }  // namespace chromeos