Revert 211950 "Display DNS probe results."

Revert 211950 "Display DNS probe results."

> Display DNS probe results.
> 
> 1. Modify the browser-side NetErrorTabHelper to send extra messages when it
>    starts or declines to start a DNS probe.
> 
> 2. Create a new error domain, "dnsprobe", with errors for "might run a DNS
>    probe", "currently running a DNS probe", and all of the possible probe
>    results.
> 
> 3. Modify ChromeContentRendererClient to give the renderer-side NetErrorHelper
>    a chance to choose the error strings before we call LocalizedError directly.
> 
> 4. Catch DNS errors and provide the strings for the "might run a DNS probe"
>    pseudo-error instead.
> 
> 5. Add a function to neterror.html that lets us re-render the template with a
>    new set of strings.
> 
> 6. When we get a "probe started" message, replace the strings with those for
>    the "currently running a DNS probe" pseudo-error.
> 
> 7. When we get a "probe finished" message, replace the strings with those for
>    the probe result.
> 
> 8. When we get a "probe not run" message, replace the strings with those for
>    the original error we received.
> 
> BUG=156415
> TEST=DnsProbeBrowserTest
> 
> Review URL: https://chromiumcodereview.appspot.com/13270005

TBR=ttuttle@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=212349

[kareng, 2013-07-18 14:20:23]

Committed patchset #1 manually as r212349.