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

ui/views/controls/webview/webview.cc

Index: ui/views/controls/webview/webview.cc
diff --git a/ui/views/controls/webview/webview.cc b/ui/views/controls/webview/webview.cc
index eb7846ba6c99d39d147be11fb74e3b1bcd6e3540..902ec5661b06251ca7287916d38791a26891e94b 100644
--- a/ui/views/controls/webview/webview.cc
+++ b/ui/views/controls/webview/webview.cc
@@ -46,11 +46,7 @@ content::WebContents* WebView::GetWebContents() {
 void WebView::CreateWebContentsWithSiteInstance(
     content::SiteInstance* site_instance) {
   if (!web_contents_) {
-    wc_owner_.reset(content::WebContents::Create(browser_context_,
-                                                 site_instance,
-                                                 MSG_ROUTING_NONE,
-                                                 NULL,
-                                                 NULL));
+    wc_owner_.reset(CreateWebContents(browser_context_, site_instance));
     web_contents_ = wc_owner_.get();
     web_contents_->SetDelegate(this);
     AttachWebContents();
@@ -171,6 +167,19 @@ void WebView::WebContentsFocused(content::WebContents* web_contents) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// WebView, protected:
+
+content::WebContents* WebView::CreateWebContents(
+      content::BrowserContext* browser_context,
+      content::SiteInstance* site_instance) {
+  return content::WebContents::Create(browser_context,
+                                      site_instance,
+                                      MSG_ROUTING_NONE,
+                                      NULL,
+                                      NULL);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // WebView, private:
 
 void WebView::AttachWebContents() {