To protect your data and block access to Chrome when you get up from your computer, you can turn to one of Chrome’s experimental features that lets you lock the browser. It also lets you manage multiple accounts and provides guest access.
To access this feature, follow this simple, four-step process:
1. Head to chrome://flags
2. Search for “Enable new profile management system”
3. Click the Enable link
4. Click the Relaunch Now button at the bottom of Chrome
When Chrome restarts, you’ll see a button in the upper-right corner labeled “First user.” Click on it to reveal a small panel where you can log into your account(s). You can also rename this profile and choose a profile image. You can also create additional user profiles, each of which can support multiple accounts. Oddly, the first profile I created did not pull in the photo associated with my account, but the second profile I created did. For the first, I could choose only from a list of icons. Thus, the blurry ninja picture.
Source: CNET