Implements the predefined options in Browser Actions context menu. The predefined options includes:
1. "Open in new Chrome tab": open a tab with given url in Chrome in background.
2. "Open in incognito tab": open an incognito tab with given url in Chrome.
3. "Download link": download the webpage of given url.
4. "Copy link": copy the given url.
5. "Share" & direct share: share or direct share the given url.
Comment 1 by bugdroid1@chromium.org
, May 19 2017