1. On the Chromebook, click on time and then Settings icon.
2. In Connect to your phone, click Accept & continue.
3. Under Connected devices, click Set up.
4. Enter the password for Google account. Then click Done.
5. On the phone, you may see this message: Do you recognized this activity?
Click Yes, it was me to continue.
6. Click Done in Thanks for confirming it was you.
Now, in the phone connection, you see Chromebook Linked to Chromebook.
Please view this step by step video: