ForgetGalleryCallback 11 chrome/browser/media_galleries/media_gallery_context_menu.cc const ForgetGalleryCallback& callback) ForgetGalleryCallback 19 chrome/browser/media_galleries/media_gallery_context_menu.h explicit MediaGalleryContextMenu(const ForgetGalleryCallback& callback); ForgetGalleryCallback 36 chrome/browser/media_galleries/media_gallery_context_menu.h ForgetGalleryCallback callback_;