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

ui/views/controls/webview/webview.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 #define UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 84 matching lines @@
   // Overridden from content::WebContentsDelegate:
   virtual void WebContentsFocused(content::WebContents* web_contents) OVERRIDE;
 
   void AttachWebContents();
   void DetachWebContents();
 
   void RenderViewHostChanged(content::RenderViewHost* old_host,
                              content::RenderViewHost* new_host);
   void WebContentsDestroyed(content::WebContents* web_contents);
 
+  // Create a regular or test web contents (based on whether we're running
+  // in a unit test or not).
+  content::WebContents* CreateWebContents(
+      content::BrowserContext* browser_context,
+      content::SiteInstance* site_instance);
+
+
   NativeViewHost* wcv_holder_;
   scoped_ptr<content::WebContents> wc_owner_;
   content::WebContents* web_contents_;
   content::BrowserContext* browser_context_;
   content::NotificationRegistrar registrar_;
   bool allow_accelerators_;
 
   DISALLOW_COPY_AND_ASSIGN(WebView);
 };
 
 }  // namespace views
 
-#endif  // UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
+#endif  // UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_