Drop [LegacyImplementedInBaseClass] attribute from WindowTimers

Source/core/page/DOMWindowTimers.h

Index: Source/core/page/DOMWindowTimers.h
diff --git a/Source/core/page/DOMWindowBase64.h b/Source/core/page/DOMWindowTimers.h
similarity index 80%
copy from Source/core/page/DOMWindowBase64.h
copy to Source/core/page/DOMWindowTimers.h
index 50b79721cfb415ea811843e4b097275b293d6ad7..2a28f81810c751f9331f6f421d0c0d57a87b7813 100644
--- a/Source/core/page/DOMWindowBase64.h
+++ b/Source/core/page/DOMWindowTimers.h
@@ -30,19 +30,23 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef DOMWindowBase64_h
-#define DOMWindowBase64_h
+#ifndef DOMWindowTimers_h
+#define DOMWindowTimers_h
 
-#include "core/dom/ExceptionCode.h"
-#include "wtf/text/WTFString.h"
+#include "wtf/Forward.h"
 
 namespace WebCore {
 
-namespace DOMWindowBase64 {
-String btoa(void*, const String& stringToEncode, ExceptionCode&);
-String atob(void*, const String& encodedString, ExceptionCode&);
+class EventTarget;
+class ScheduledAction;
+
+namespace DOMWindowTimers {
+int setTimeout(EventTarget*, PassOwnPtr<ScheduledAction>, int timeout);
+int setInterval(EventTarget*, PassOwnPtr<ScheduledAction>, int timeout);
+void clearTimeout(EventTarget*, int timeoutId);
+void clearInterval(EventTarget*, int timeoutId);
 }
 
 } // namespace WebCore
 
-#endif // DOMWindowBase64_h
+#endif // DOMWindowTimers_h