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

content/test/test_render_view_host_factory.h

Index: content/test/test_render_view_host_factory.h
diff --git a/content/test/test_render_view_host_factory.h b/content/test/test_render_view_host_factory.h
new file mode 100644
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+++ b/content/test/test_render_view_host_factory.h
@@ -0,0 +1,54 @@
+// 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 CONTENT_TEST_TEST_RENDER_VIEW_HOST_FACTORY_H_
+#define CONTENT_TEST_TEST_RENDER_VIEW_HOST_FACTORY_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "content/browser/renderer_host/render_view_host_factory.h"
+
+namespace content {
+
+class SiteInstance;
+class RenderViewHostDelegate;
+class RenderProcessHostFactory;
+class SessionStorageNamespace;
+
+// Manages creation of the RenderViewHosts using our special subclass. This
+// automatically registers itself when it goes in scope, and unregisters itself
+// when it goes out of scope. Since you can't have more than one factory
+// registered at a time, you can only have one of these objects at a time.
+class TestRenderViewHostFactory : public RenderViewHostFactory {
+ public:
+  explicit TestRenderViewHostFactory(
+      content::RenderProcessHostFactory* rph_factory);
+  virtual ~TestRenderViewHostFactory();
+
+  virtual void set_render_process_host_factory(
+      content::RenderProcessHostFactory* rph_factory);
+  virtual content::RenderViewHost* CreateRenderViewHost(
+      content::SiteInstance* instance,
+      content::RenderViewHostDelegate* delegate,
+      int routing_id,
+      bool swapped_out,
+      content::SessionStorageNamespace* session_storage) OVERRIDE;
+
+ private:
+  // This is a bit of a hack. With the current design of the site instances /
+  // browsing instances, it's difficult to pass a RenderProcessHostFactory
+  // around properly.
+  //
+  // Instead, we set it right before we create a new RenderViewHost, which
+  // happens before the RenderProcessHost is created. This way, the instance
+  // has the correct factory and creates our special RenderProcessHosts.
+  content::RenderProcessHostFactory* render_process_host_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestRenderViewHostFactory);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_TEST_TEST_RENDER_VIEW_HOST_FACTORY_H_