Called when a new frame is created. This will be the first notification
that references |frame|. Any commands that require transport to the
associated renderer process (LoadRequest, SendProcessMessage, GetSource,
etc.) will be queued until OnFrameAttached is called for |frame|.
Called when a new frame is created. This will be the first notification that references |frame|. Any commands that require transport to the associated renderer process (LoadRequest, SendProcessMessage, GetSource, etc.) will be queued until OnFrameAttached is called for |frame|.