Add DesktopCapturer::Result::MAX_RESULT

webrtc/modules/desktop_capture/desktop_capturer.h

Index: webrtc/modules/desktop_capture/desktop_capturer.h
diff --git a/webrtc/modules/desktop_capture/desktop_capturer.h b/webrtc/modules/desktop_capture/desktop_capturer.h
index 80d910908b4fe213bb1f139795b329f2446de61f..d6da81d9fedb70ba191a9ad16d30b5714edad221 100644
--- a/webrtc/modules/desktop_capture/desktop_capturer.h
+++ b/webrtc/modules/desktop_capture/desktop_capturer.h
@@ -37,6 +37,8 @@ class DesktopCapturer {
     // Capture has failed and will keep failing if the caller tries calling
     // Capture() again.
     ERROR_PERMANENT,
+
+    MAX_VALUE = ERROR_PERMANENT
   };
 
   // Interface that must be implemented by the DesktopCapturer consumers.