Screensaver implementation for ChromeOS.

ash/screensaver/screensaver_view.cc

Index: ash/screensaver/screensaver_view.cc
diff --git a/ash/screensaver/screensaver_view.cc b/ash/screensaver/screensaver_view.cc
index d42b50dfd3ea6c7c8ce755bfd86402e097fa0fb8..a0e5ddaf059c98c04eb5b8b6024469dfb156e98d 100644
--- a/ash/screensaver/screensaver_view.cc
+++ b/ash/screensaver/screensaver_view.cc
@@ -39,6 +39,10 @@ void CloseScreensaver() {
   internal::ScreensaverView::CloseScreensaver();
 }
 
+bool IsScreensaverShown() {
+  return internal::ScreensaverView::IsScreensaverShown();
+}
+
 namespace internal {
 
 // static
@@ -56,6 +60,16 @@ void ScreensaverView::CloseScreensaver() {
     g_instance = NULL;
   }
 }
+// static
+bool ScreensaverView::IsScreensaverShown() {
+  return g_instance && g_instance->IsScreensaverShowingURL(g_instance->url_);
+}
+
+bool ScreensaverView::IsScreensaverShowingURL(const GURL& url) {
+  return screensaver_webview_ &&
+      screensaver_webview_->web_contents() &&
+      (screensaver_webview_->web_contents()->GetURL() == url);
+}
 
 ////////////////////////////////////////////////////////////////////////////////
 // ScreensaverView, views::WidgetDelegateView implementation.