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

chrome/browser/ui/views/ash/chrome_shell_delegate.h

Index: chrome/browser/ui/views/ash/chrome_shell_delegate.h
diff --git a/chrome/browser/ui/views/ash/chrome_shell_delegate.h b/chrome/browser/ui/views/ash/chrome_shell_delegate.h
index 7a71f49d21e7404820385817a0ac96e3f7cb2935..9415ce45518acc3dd015207fc8c96d177ca68ee7 100644
--- a/chrome/browser/ui/views/ash/chrome_shell_delegate.h
+++ b/chrome/browser/ui/views/ash/chrome_shell_delegate.h
@@ -42,6 +42,7 @@ class ChromeShellDelegate : public ash::ShellDelegate,
   virtual void OpenFileManager() OVERRIDE;
   virtual void OpenCrosh() OVERRIDE;
   virtual void OpenMobileSetup() OVERRIDE;
+  virtual content::BrowserContext* GetCurrentBrowserContext() OVERRIDE;
   virtual ash::AppListViewDelegate* CreateAppListViewDelegate() OVERRIDE;
   virtual void StartPartialScreenshot(
       ash::ScreenshotDelegate* screenshot_delegate) OVERRIDE;