Add Google+ search to Chrome.

1. Open URL: chrome://settings/searchEngines
2. Add new entry with following values:

(Search in posts)
- Column 1: Google+ Posts
- Column 2: post
- Column 3: {google:baseURL}search?q=site:plus.google.com inurl:posts/* %s

(Search for profiles)
- Column 1: Google+ Profiles
- Column 2: profile
- Column 3: {google:baseURL}search?q=%s&tbs=prfl:e

Insert %s in the URL where search terms should appear