SPDY - Don't add any users into SPDY/3 experiment in

chrome/browser/chrome_browser_main.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/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 771 matching lines @@
   } else if (parsed_command_line().HasSwitch(switches::kEnableNpn)) {
     net::HttpStreamFactory::EnableNpnSpdy();
     use_field_trial = false;
   } else if (parsed_command_line().HasSwitch(switches::kEnableNpnHttpOnly)) {
     net::HttpStreamFactory::EnableNpnHttpOnly();
     use_field_trial = false;
   }
   if (use_field_trial) {
     const base::FieldTrial::Probability kSpdyDivisor = 100;
     base::FieldTrial::Probability npnhttp_probability = 5;
-    base::FieldTrial::Probability spdy3_probability = 50;
+    base::FieldTrial::Probability spdy3_probability = 0;
 
     chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
     if (channel == chrome::VersionInfo::CHANNEL_CANARY ||
         channel == chrome::VersionInfo::CHANNEL_UNKNOWN) {
       // 5% is for HTTP (no SPDY) and 5% for default SPDY (SPDY/2).
       spdy3_probability = 90;
+    } else if (channel == chrome::VersionInfo::CHANNEL_DEV) {
+      spdy3_probability = 50;
     }
 
 #if defined(OS_CHROMEOS)
     // Always enable SPDY (spdy/2 or spdy/3) on Chrome OS
     npnhttp_probability = 0;
 #endif  // !defined(OS_CHROMEOS)
 
     // NPN with spdy support is the default.
     int npn_spdy_grp = -1;
 
@@ skipping 1170 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }