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

chrome/browser/ui/views/accessibility_event_router_views_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 <string>
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/accessibility/accessibility_extension_api.h"
@@ skipping 72 matching lines @@
     return 0;
   }
 
 #if defined(USE_AURA)
   virtual views::NativeWidgetHelperAura* CreateNativeWidgetHelper(
       views::NativeWidgetAura* native_widget) OVERRIDE {
     return NULL;
   }
 #endif
 
+  virtual content::WebContents* CreateWebContents(
+      content::BrowserContext* browser_context,
+      content::SiteInstance* site_instance) OVERRIDE {
+    return NULL;
+  }
+
   DISALLOW_COPY_AND_ASSIGN(AccessibilityViewsDelegate);
 };
 
 class AccessibilityWindowDelegate : public views::WidgetDelegate {
  public:
   explicit AccessibilityWindowDelegate(views::View* contents)
       : contents_(contents) { }
 
   // Overridden from views::WidgetDelegate:
   virtual void DeleteDelegate() OVERRIDE { delete this; }
@@ skipping 231 matching lines @@
 
   // Test that we got the event with the expected name and context.
   EXPECT_EQ(1, focus_event_count_);
   EXPECT_EQ(kButtonNameASCII, last_control_name_);
   EXPECT_EQ(kAlertTextASCII, last_control_context_);
 
   window->CloseNow();
 }
 
 #endif  // defined(TOOLKIT_VIEWS)