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

content/test/test_render_view_host_factory.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 "content/test/test_render_view_host_factory.h"
+
+#include "content/browser/renderer_host/test_render_view_host.h"
+#include "content/browser/site_instance_impl.h"
+#include "content/public/browser/render_process_host_factory.h"
+
+namespace content {
+
+TestRenderViewHostFactory::TestRenderViewHostFactory(
+    content::RenderProcessHostFactory* rph_factory)
+    : render_process_host_factory_(rph_factory) {
+  RenderViewHostFactory::RegisterFactory(this);
+}
+
+TestRenderViewHostFactory::~TestRenderViewHostFactory() {
+  RenderViewHostFactory::UnregisterFactory();
+}
+
+void TestRenderViewHostFactory::set_render_process_host_factory(
+    content::RenderProcessHostFactory* rph_factory) {
+  render_process_host_factory_ = rph_factory;
+}
+
+content::RenderViewHost* TestRenderViewHostFactory::CreateRenderViewHost(
+    SiteInstance* instance,
+    RenderViewHostDelegate* delegate,
+    int routing_id,
+    SessionStorageNamespace* session_storage) {
+  // See declaration of render_process_host_factory_ below.
+  static_cast<SiteInstanceImpl*>(instance)->
+      set_render_process_host_factory(render_process_host_factory_);
+  return new TestRenderViewHost(instance, delegate, routing_id);
+}
+
+}  // namespace content