diff --git a/content/common/frame.mojom b/content/common/frame.mojom
index b0a7515..a7cb70c 100644
--- a/content/common/frame.mojom
+++ b/content/common/frame.mojom
@@ -515,4 +515,11 @@
       url.mojom.Url url,
       int32 error_code,
       mojo_base.mojom.String16 error_description);
+
+  // Sent to the browser process to transfer the user activation state from the
+  // source frame to the frame sending this IPC. The browser will update the
+  // user activation state of the frames in the frame tree in the non-source and
+  // non-target renderer processes.
+  TransferUserActivationFrom(int32 source_routing_id);
 };
+
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index c81c9fb4..eeed7b8 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -1636,13 +1636,6 @@
                     int /* offset (from current) of history item to get */,
                     bool /* has_user_gesture */)
 
-// Sent to the browser process to transfer the user activation state from the
-// source frame to the frame sending this IPC. The browser will update the user
-// activation state of the frames in the frame tree in the non-source and
-// non-target renderer processes.
-IPC_MESSAGE_ROUTED1(FrameHostMsg_TransferUserActivationFrom,
-                    int /* source_routing_id */)
-
 #if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
 
 // Message to show/hide a popup menu using native controls.