1 files changed, 5 insertions, 14 deletions
diff --git a/Source/WebCore/page/PageVisibilityState.h b/Source/WebCore/page/PageVisibilityState.h
index 3fab2e42a..53f3ebf74 100644
--- a/Source/WebCore/page/PageVisibilityState.h
+++ b/Source/WebCore/page/PageVisibilityState.h
@@ -28,25 +28,16 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef PageVisibilityState_h
-#define PageVisibilityState_h
+#pragma once
 
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
-// The enum is not flag protected as it is used in the WebKit chromium API
-// without flag protection.
-enum PageVisibilityState {
-    PageVisibilityStateVisible,
-    PageVisibilityStateHidden,
-    PageVisibilityStatePrerender
+enum class PageVisibilityState {
+    Hidden,
+    Visible,
+    Prerender
 };
 
-#if ENABLE(PAGE_VISIBILITY_API)
-String pageVisibilityStateString(PageVisibilityState);
-#endif
-
 } // namespace WebCore
-
-#endif // ifndef PageVisibilityState_h