Screensaver implementation for ChromeOS.

ash/screensaver/screensaver_view.h

Index: ash/screensaver/screensaver_view.h
diff --git a/ash/screensaver/screensaver_view.h b/ash/screensaver/screensaver_view.h
index 434dd29b85dfda16d00a750423acf2e9da5dd591..34f42a503b4c57a5b67a9cd93697b7f7a85bde91 100644
--- a/ash/screensaver/screensaver_view.h
+++ b/ash/screensaver/screensaver_view.h
@@ -27,6 +27,7 @@ class ScreensaverViewTest;
 
 ASH_EXPORT void ShowScreensaver(const GURL& url);
 ASH_EXPORT void CloseScreensaver();
+ASH_EXPORT bool IsScreensaverShown();
 
 typedef
     base::Callback<views::WebView*(content::BrowserContext*)> WebViewFactory;
@@ -42,6 +43,8 @@ class ScreensaverView : public views::WidgetDelegateView,
   static void ShowScreensaver(const GURL& url);
   static void CloseScreensaver();
 
+  static bool IsScreensaverShown();
+
  private:
   friend class test::ScreensaverViewTest;
 
@@ -67,6 +70,7 @@ class ScreensaverView : public views::WidgetDelegateView,
 
   // For testing purposes.
   static ASH_EXPORT ScreensaverView* GetInstance();
+  bool IsScreensaverShowingURL(const GURL& url);
 
   // URL to show in the screensaver.
   GURL url_;