[Media] Add user gesture reporting for API calls to midi and media streams.

content/common/media/midi_messages.h

Index: content/common/media/midi_messages.h
diff --git a/content/common/media/midi_messages.h b/content/common/media/midi_messages.h
index 5a0fd7eb1f6c11f966252ab0fadf5d4bd2d9b21e..c907a983c933e1734a9d8efa39fb97c9c18a907a 100644
--- a/content/common/media/midi_messages.h
+++ b/content/common/media/midi_messages.h
@@ -25,10 +25,11 @@ IPC_STRUCT_TRAITS_END()
 // Messages for IPC between MidiDispatcher and MidiDispatcherHost.
 
 // Renderer request to browser for using system exclusive messages.
-IPC_MESSAGE_CONTROL3(MidiHostMsg_RequestSysExPermission,
+IPC_MESSAGE_CONTROL4(MidiHostMsg_RequestSysExPermission,
                      int /* routing id */,
                      int /* client id */,
-                     GURL /* origin */)
+                     GURL /* origin */,
+                     bool /* user_gesture */)
 
 // Renderer request to browser for canceling a previous permission request.
 IPC_MESSAGE_CONTROL3(MidiHostMsg_CancelSysExPermissionRequest,