Revert of Revert of Never send a referrer header if the referrer is not a web url

Revert of Revert of Never send a referrer header if the referrer is not a web url (https://codereview.chromium.org/133863003/)

Reason for revert:
Fixed the browser test meanwhile.

Original issue's description:
> Revert of Never send a referrer header if the referrer is not a web url (https://codereview.chromium.org/136583002/)
> 
> Reason for revert:
> This is the probable cause for the failing browser test CorrectReferrer. See:
> 
> http://build.chromium.org/p/chromium.webkit/builders/Linux%20Tests%20%28dbg%29/builds/1302/steps/browser_tests/logs/CorrectReferrer
> 
> http://build.chromium.org/p/chromium.webkit/builders/Mac10.8%20Tests/builds/5398/steps/browser_tests/logs/CorrectReferrer
> 
> http://build.chromium.org/p/chromium.webkit/builders/Win7%20Tests/builds/543/steps/browser_tests/logs/CorrectReferrer
> 
> Original issue's description:
> > Never send a referrer header if the referrer is not a web url
> > 
> > BUG=none
> > R=abarth@chromium.org
> > 
> > Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165085
> 
> TBR=abarth@chromium.org,jochen@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=none
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165090

TBR=abarth@chromium.org,tdanderson@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165140

[jochen (gone - plz use gerrit), 2014-01-15 15:32:33]

Created Revert of Revert of Never send a referrer header if the referrer is not
a web url

[commit-bot: I haz the power, 2014-01-15 15:43:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jochen@chromium.org/130173004/1

[commit-bot: I haz the power, 2014-01-15 15:58:12]

Change committed as 165140