Enable HTTP pipelining field trial on dev channel for 10% of users.

chrome/browser/net/http_pipelining_compatibility_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/net/http_pipelining_compatibility_client.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
@@ skipping 452 matching lines @@
   const base::FieldTrial::Probability kDivisor = 100;
   base::FieldTrial::Probability probability_to_run_test = 0;
 
   const char* kTrialName = "HttpPipeliningCompatibility";
   base::FieldTrial* trial = base::FieldTrialList::Find(kTrialName);
   if (trial) {
     return;
   }
   // After April 21, 2012, the trial will disable itself.
   trial = base::FieldTrialList::FactoryGetFieldTrial(
       kTrialName, kDivisor, "disable_test", 2012, 4, 21, NULL);

[cbentzel, 2012/04/16 18:52:24]

Are you going to want to bump this up as well?

[James Simonsen, 2012/04/16 19:05:29]

I think I'll wait until I bump it up to 100%, just to err on the side of
paranoia. This is the first time it'll be on dev channel. If all is well, I'll
extend it and go to 100% later this week.

 
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_CANARY) {
     probability_to_run_test = 100;
+  } else if (channel == chrome::VersionInfo::CHANNEL_DEV) {
+    probability_to_run_test = 10;
   }
 
   int collect_stats_group = trial->AppendGroup("enable_test",
                                                probability_to_run_test);
   if (trial->group() != collect_stats_group) {
     return;
   }
 
   std::vector<RequestInfo> requests;
 
@@ skipping 41 matching lines @@
   content::BrowserThread::PostTask(
       content::BrowserThread::IO,
       FROM_HERE,
       base::Bind(&CollectPipeliningCapabilityStatsOnIOThread,
                  pipeline_test_server,
                  make_scoped_refptr(
                      io_thread->system_url_request_context_getter())));
 }
 
 }  // namespace chrome_browser_net