LINE (Chrome拡張機能 https://chrome.google.com/webstore/detail/line/ophjlpahpchlmihnnnihgmmeilfjmjjc ) のデスクトップエントリー

naver-line.desktop

#!/usr/bin/env xdg-open
[Desktop Entry]
Version=1.0
Terminal=false
Type=Application
Name=LINE
Exec=chromium --profile-directory=Default --app=chrome-extension://ophjlpahpchlmihnnnihgmmeilfjmjjc/index.html
Icon=naver-line
StartupWMClass=crx_ophjlpahpchlmihnnnihgmmeilfjmjjc
#
# Execute the following command if you want icon for desktop entry
# for s in {32,48,64,96,128}; do xdg-icon-resource install --size ${s} --context apps ~/.config/chromium/Default/Extensions/ophjlpahpchlmihnnnihgmmeilfjmjjc/2.1.0_0/res/img/line_logo_${s}x${s}_on.png naver-line; done

To install, copy the file into ~/.local/share/applications.
You can append Categories=GNOME;GTK;Network;InstantMessaging; to the file to make it show up in the right menu category.