Re-implement the screensaver to use WebView instead of ExtensionDialogHost.

chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver_unittest.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/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 49 matching lines @@
         .Times(AnyNumber())
         .WillRepeatedly(HasObserver(&observer_));
     EXPECT_CALL(*power_manager, AddObserver(_))
         .WillOnce(SaveArg<0>(&observer_));
     EXPECT_CALL(*power_manager, RemoveObserver(_))
         .WillOnce(RemoveObserver(&observer_));
     EXPECT_CALL(*power_manager, RequestIdleNotification(_))
         .Times(AnyNumber());
 
     screensaver_ = new KioskModeScreensaver();
-    screensaver_->SetupScreensaver(NULL, FilePath());
+    screensaver_->SetupScreensaver(NULL, NULL, FilePath());
   }
 
   virtual void TearDown() OVERRIDE {
     delete screensaver_;
     DBusThreadManager::Shutdown();
   }
 
   bool LoginUserObserverRegistered() {
     return screensaver_->registrar_.IsRegistered(
         screensaver_,
@@ skipping 26 matching lines @@
 TEST_F(KioskModeScreensaverTest, CheckObserversAfterUserLogin) {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_SESSION_STARTED,
       content::Source<UserManager>(UserManager::Get()),
       content::NotificationService::NoDetails());
 
   EXPECT_FALSE(PowerManagerObserverRegistered());
 }
 
 }  // namespace chromeos