The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f3798161a835bcfd9b257074093b4a44422d9a1a

commit f3798161a835bcfd9b257074093b4a44422d9a1a
Author: tbansal <tbansal@chromium.org>
Date: Wed Oct 12 16:47:35 2016

Record scheme of the data reduction proxy server

UMA is added which records the scheme of the data reduction
proxy server used. This would be used for determining how
many requests were successfully fetched using HTTPS data
reduction proxy vs. QUIC data reduction proxy.

BUG= 654793 

Review-Url: https://codereview.chromium.org/2407073002
Cr-Commit-Position: refs/heads/master@{#424764}

[modify] https://crrev.com/f3798161a835bcfd9b257074093b4a44422d9a1a/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats.cc
[modify] https://crrev.com/f3798161a835bcfd9b257074093b4a44422d9a1a/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats_unittest.cc
[modify] https://crrev.com/f3798161a835bcfd9b257074093b4a44422d9a1a/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/10939b0d35b8e8ac58010b67c860f2a5a53da5d3

commit 10939b0d35b8e8ac58010b67c860f2a5a53da5d3
Author: tbansal <tbansal@chromium.org>
Date: Thu Oct 20 00:11:27 2016

Record Proxy Server scheme accurately

The scheme of the proxy server is current read from
proxy_info which may not match the scheme of the proxy
server actually used (e.g., when there is a race between
HTTP2 and QUIC connection). This CL fixes the bug by reading
the scheme from the proxy server set in the request (instead
of from the proxy_info).

BUG= 654793 

Review-Url: https://chromiumcodereview.appspot.com/2426903003
Cr-Commit-Position: refs/heads/master@{#426346}

[modify] https://crrev.com/10939b0d35b8e8ac58010b67c860f2a5a53da5d3/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats.cc
[modify] https://crrev.com/10939b0d35b8e8ac58010b67c860f2a5a53da5d3/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats_unittest.cc
[modify] https://crrev.com/10939b0d35b8e8ac58010b67c860f2a5a53da5d3/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.cc
[modify] https://crrev.com/10939b0d35b8e8ac58010b67c860f2a5a53da5d3/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h
[modify] https://crrev.com/10939b0d35b8e8ac58010b67c860f2a5a53da5d3/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h