Revert of Moving proxy resolution logic out of NetworkDelegate and into ProxyDelegate

Revert of Moving proxy resolution logic out of NetworkDelegate and into ProxyDelegate for DataReductionProxy (patchset #6 id:90001 of https://codereview.chromium.org/1680893002/ )

Reason for revert:
Most likely cause of failing test on bot:
https://bugs.chromium.org/p/chromium/issues/detail?id=589832


Original issue's description:
> Moving proxy resolution logic out of NetworkDelegate and into ProxyDelegate for DataReductionProxy
> 
> This involves removing two methods off the NetworkDelegate interface (and four off LayeredNetworkDelegate). DataReductionProxy's logic for these two methods will be moved to the DataReductionProxyDelegate from the DataReductionProxyNetworkDelegate. This also involved cleaning up some unit tests and moving calls to use ProxyDelegate instead of NetworkDelegate where relevant.
> 
> Refactoring proxy related calls from NetworkDelegate to ProxyDelegate
> 
> BUG=583369
> 
> Committed: https://crrev.com/7de050c68ce2a97c0165d09d06c89b8aff79fb77
> Cr-Commit-Position: refs/heads/master@{#376860}

TBR=bengr@chromium.org,asanka@chromium.org,ryansturm@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=583369

[agrieve, 2016-02-25 17:06:54]

Created Revert of Moving proxy resolution logic out of NetworkDelegate and into
ProxyDelegate for DataReductionProxy

[RyanSturm, 2016-02-25 17:11:04]

On 2016/02/25 17:06:54, agrieve wrote:
> Created Revert of Moving proxy resolution logic out of NetworkDelegate and
into
> ProxyDelegate for DataReductionProxy

Fix for this issue is in code review here:
https://codereview.chromium.org/1725123005/

[RyanSturm, 2016-02-25 17:11:13]

On 2016/02/25 17:06:54, agrieve wrote:
> Created Revert of Moving proxy resolution logic out of NetworkDelegate and
into
> ProxyDelegate for DataReductionProxy

Fix for this issue is in code review here:
https://codereview.chromium.org/1725123005/

[commit-bot: I haz the power, 2016-02-25 17:14:28]

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

[commit-bot: I haz the power, 2016-02-25 17:14:29]

Try jobs failed on following builders:
  android_clang_dbg_recipe on tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_clan...)
  cast_shell_android on tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/cast_shell_a...)
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_gn_rel on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_gn_r...)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[agrieve, 2016-02-25 18:26:57]

On 2016/02/25 17:11:13, Ryan Sturm wrote:
> On 2016/02/25 17:06:54, agrieve wrote:
> > Created Revert of Moving proxy resolution logic out of NetworkDelegate and
> into
> > ProxyDelegate for DataReductionProxy
> 
> Fix for this issue is in code review here:
> https://codereview.chromium.org/1725123005/

Okay, great!

[bengr, 2016-03-07 22:43:34]

On 2016/02/25 18:26:57, agrieve wrote:
> On 2016/02/25 17:11:13, Ryan Sturm wrote:
> > On 2016/02/25 17:06:54, agrieve wrote:
> > > Created Revert of Moving proxy resolution logic out of NetworkDelegate and
> > into
> > > ProxyDelegate for DataReductionProxy
> > 
> > Fix for this issue is in code review here:
> > https://codereview.chromium.org/1725123005/
> 
> Okay, great!

Seems this CL isn't necessary. Mind closing it?