Run Squid as a reverse caching proxy on port 80 and proxy the requests

Run Squid as a reverse caching proxy on port 80 and proxy the requests
to the server running on port 8000.

BUG=skia:

Committed: http://code.google.com/p/skia/source/detail?r=14515

[mtklein, 2014-05-01 15:50:25]

lgtm

[jcgregorio, 2014-05-01 15:50:38]

The CQ bit was checked by jcgregorio@google.com

[commit-bot: I haz the power, 2014-05-01 15:50:52]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/jcgregorio@google.com/261023002/1

[commit-bot: I haz the power, 2014-05-01 19:09:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-01 19:09:29]

Retried try job too often on Build-Ubuntu13.10-GCC4.8-Arm7-Debug-Nexus7-Trybot
for step(s) BuildBench, BuildEverything, BuildGm, BuildSkiaLib, BuildTests,
BuildTools
http://skia-tree-status.appspot.com/redirect/compile-buildbots/buildstatus?bu...

[jcgregorio, 2014-05-01 20:09:20]

The CQ bit was checked by jcgregorio@google.com

[commit-bot: I haz the power, 2014-05-01 20:09:35]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/jcgregorio@google.com/261023002/1

[commit-bot: I haz the power, 2014-05-01 20:10:11]

Change committed as 14515