I'm using Chrome 32 on an Android tablet (not phone) and just can't figure out how to close all open tabs in one go.
- Click on Tabs icon in upper right corner
- Go to options
- Click on close all tabs
According to this Google Support page, you can't.
You have to close tabs individually, at least on a tablet.
I went to Android's settings, then to apps, then to Chrome, and cleared the data and the cache. When I reopened Chrome, the tabs were all closed. This was done on a Asus Memo 7 tablet. I know it's combersome, but it beats manually closing 100+ tabs.