Re-enable SPDY *HOLDBACK* field trials.

chrome/browser/chrome_browser_main.cc

 // Copyright (c) 2011 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 840 matching lines @@
   if (parsed_command_line().HasSwitch(switches::kUseSpdy)) {
     std::string spdy_mode =
         parsed_command_line().GetSwitchValueASCII(switches::kUseSpdy);
     net::HttpNetworkLayer::EnableSpdy(spdy_mode);
   } else {
 #if !defined(OS_CHROMEOS)
     bool is_spdy_trial = false;
     const base::FieldTrial::Probability kSpdyDivisor = 100;
     base::FieldTrial::Probability npnhttp_probability = 5;
 
-    // After June 30, 2011 builds, it will always be in default group.
+    // After June 30, 2013 builds, it will always be in default group.
     scoped_refptr<base::FieldTrial> trial(
         new base::FieldTrial(
-            "SpdyImpact", kSpdyDivisor, "npn_with_spdy", 2011, 6, 30));
+            "SpdyImpact", kSpdyDivisor, "npn_with_spdy", 2013, 6, 30));
 
     // npn with spdy support is the default.
     int npn_spdy_grp = trial->kDefaultGroupNumber;
 
     // npn with only http support, no spdy.
     int npn_http_grp = trial->AppendGroup("npn_with_http", npnhttp_probability);
 
     int trial_grp = trial->group();
     if (trial_grp == npn_http_grp) {
       is_spdy_trial = true;
@@ skipping 10 matching lines @@
 #endif  // !defined(OS_CHROMEOS)
   }
 
   // Setup SPDY CWND Field trial.
   const base::FieldTrial::Probability kSpdyCwndDivisor = 100;
   const base::FieldTrial::Probability kSpdyCwnd16 = 20;     // fixed at 16
   const base::FieldTrial::Probability kSpdyCwnd10 = 20;     // fixed at 10
   const base::FieldTrial::Probability kSpdyCwndMin16 = 20;  // no less than 16
   const base::FieldTrial::Probability kSpdyCwndMin10 = 20;  // no less than 10
 
-  // After June 30, 2011 builds, it will always be in default group
+  // After June 30, 2013 builds, it will always be in default group
   // (cwndDynamic).
   scoped_refptr<base::FieldTrial> trial(
       new base::FieldTrial(
-          "SpdyCwnd", kSpdyCwndDivisor, "cwndDynamic", 2011, 6, 30));
+          "SpdyCwnd", kSpdyCwndDivisor, "cwndDynamic", 2013, 6, 30));
 
   trial->AppendGroup("cwnd10", kSpdyCwnd10);
   trial->AppendGroup("cwnd16", kSpdyCwnd16);
   trial->AppendGroup("cwndMin16", kSpdyCwndMin16);
   trial->AppendGroup("cwndMin10", kSpdyCwndMin10);
 
   if (parsed_command_line().HasSwitch(switches::kMaxSpdyConcurrentStreams)) {
     int value = 0;
     base::StringToInt(parsed_command_line().GetSwitchValueASCII(
             switches::kMaxSpdyConcurrentStreams),
@@ skipping 1132 matching lines @@
   if (env->GetVar(chrome::kPreReadEnvironmentVariable, &pre_read) &&
       (pre_read == "0" || pre_read == "1")) {
     std::string uma_name(name);
     uma_name += "_PreRead";
     uma_name += pre_read == "1" ? "Enabled" : "Disabled";
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }