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

content/content_tests.gypi

Index: content/content_tests.gypi
diff --git a/content/content_tests.gypi b/content/content_tests.gypi
index ad9c299f26bbf711c6702f44463aec863a1d00fa..4893b259ae8d1574117f9f4c1068f9a4326bdeee 100644
--- a/content/content_tests.gypi
+++ b/content/content_tests.gypi
@@ -90,6 +90,8 @@
         'test/test_browser_thread.h',
         'test/test_content_client.cc',
         'test/test_content_client.h',
+        'test/test_content_client_initializer.cc',
+        'test/test_content_client_initializer.h',
         'test/test_file_error_injector.cc',
         'test/test_file_error_injector.h',
         'test/test_navigation_observer.cc',
@@ -98,6 +100,8 @@
         'test/test_notification_tracker.h',
         'test/test_renderer_host.cc',
         'test/test_renderer_host.h',
+        'test/test_render_view_host_factory.cc',
+        'test/test_render_view_host_factory.h',
         'test/test_url_fetcher_factory.cc',
         'test/test_url_fetcher_factory.h',
         'test/test_web_contents_view.cc',