SPDY - Enable SPDY/3 for 95% of the users, HTTP (no SPDY) 1% of the users and

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 741 matching lines @@
     use_field_trial = false;
   } 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;
-    // 5% is for HTTP (no SPDY) and 5% for default SPDY (SPDY/2).
-    base::FieldTrial::Probability spdy3_probability = 90;
+    // Enable SPDY/3 for 95% of the users, HTTP (no SPDY) for 1% of the users
+    // and SPDY/2 for 4% of the users.
+    base::FieldTrial::Probability npnhttp_probability = 1;
+    base::FieldTrial::Probability spdy3_probability = 95;
 
 #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;
 
     // After June 30, 2013 builds, it will always be in default group.
@@ skipping 1218 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
 }