[Telemetry] Fix page sets with both file:// and http:// URLs on Android.

[Telemetry] Fix page sets with both file:// and http:// URLs on Android.

When we start the browser, it is configured to always use WPR (this makes http
work). When we go to hit the file:// URL, we need to hit the other web server
instead of WPR, but we can't reconfigure Chrome without restarting.

So, WPR has logic to forward any 127.0.0.1 requests on to another server to
allow the local HTTP server to get the requests. The problem was that we were
explicitly requesting localhost instead of 127.0.0.1 which fooled WPR.

BUG=311582
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=231858

[dtu, 2013-10-30 00:52:46]

lgtm

This is goofy. Will we also have problems with WPR archives recorded using a
local server? Like pica, jsgamebench, and soon-to-be media.tough_media_cases?

[ernstm, 2013-10-30 00:57:33]

LGTM

[tonyg, 2013-10-30 01:41:40]

> This is goofy. 

I agree. It kind of smells. I'll try to think of a way to make it better, but at
least this will get us on our feet again.

> Will we also have problems with WPR archives recorded using a
> local server? Like pica, jsgamebench, and soon-to-be media.tough_media_cases?

Hmm... maybe during recording, but not during replaying. Like I said, I'll try
to do something better here.

[commit-bot: I haz the power, 2013-10-30 02:06:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tonyg@chromium.org/51803002/1

[commit-bot: I haz the power, 2013-10-30 03:06:04]

Step "update" is always a major failure.
Look at the try server FAQ for more details.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...

[commit-bot: I haz the power, 2013-10-30 04:53:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tonyg@chromium.org/51803002/1

[commit-bot: I haz the power, 2013-10-30 13:50:10]

Retried try job too often on win7_aura for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win7_aura&...

[commit-bot: I haz the power, 2013-10-30 13:54:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tonyg@chromium.org/51803002/1

[commit-bot: I haz the power, 2013-10-30 17:05:01]

Change committed as 231858