Bootswatch symbol in Chrome tab A strange thing happen to my chrome web browser, and I don't know why, I hope you can help me.

In my chrome tabs the bootswatch symbol appears in the tab icon even when I'm not in the bootswatch website!!



I have already uninstalled the chrome browser using the AppCleaner.app, and I also checked if I had some weird extension installed.

I really don't know why this happens, it is strange. I am programming in ruby on rails and I have browsed and tried bootswatch, but I don't know why this has affected my browser!

Any help?

Edit1:

Even when I search for something the icon is there in the tab





Edit2:

Even in my tablet I have the icon!



Edit3:

If I delete this file:
macosxssd/Users/mario/Library/Application Support/Google/Chrome/Default/Bookmarks

or this file
macosxssd/Users/mario/Library/Application Support/Google/Chrome/Default/Favicons

It disappear in both devices, but It is temporary. The files are generated again.

Edit4:

Search for bootswatch in my computer:
Clear your cache.  Settings->advanced->clear browsing data.  Make sure you select Clear Cache from 'beginning of time'.  Restart browser.

Also, fyi, the favicon cache file is here, you can may try deleting that and restarting the browser.  The steps above would essentially do the same thing: 
/Library/Application Support/Google/Chrome/Default/Favicons