chrome/browser/chrome_browser_field_trials_desktop.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chrome_browser_field_trials_desktop.h"
   6
   7 #include <string>
   8
   9 #include "base/command_line.h"
  10 #include "base/metrics/field_trial.h"
  11 #include "chrome/browser/auto_launch_trial.h"
  12 #include "chrome/browser/google/google_brand.h"
  13 #include "chrome/browser/prerender/prerender_field_trial.h"
  14 #include "chrome/browser/tracing/background_tracing_field_trial.h"
  15 #include "chrome/common/chrome_switches.h"
  16 #include "chrome/common/variations/variations_util.h"
  17 #include "components/variations/variations_associated_data.h"
  18
  19 namespace chrome {
  20
  21 namespace {
  22
  23 void AutoLaunchChromeFieldTrial() {
  24   std::string brand;
  25   google_brand::GetBrand(&brand);
  26
  27   // Create a 100% field trial based on the brand code.
  28   if (auto_launch_trial::IsInExperimentGroup(brand)) {
  29     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  30                                            kAutoLaunchTrialAutoLaunchGroup);
  31   } else if (auto_launch_trial::IsInControlGroup(brand)) {
  32     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  33                                            kAutoLaunchTrialControlGroup);
  34   }
  35 }
  36
  37 void SetupLightSpeedTrials() {
  38   if (!variations::GetVariationParamValue("LightSpeed", "NoGpu").empty()) {
  39     base::CommandLine::ForCurrentProcess()->AppendSwitch(
  40         switches::kDisableGpu);
  41   }
  42 }
  43
  44 void SetupStunProbeTrial() {
  45 #if defined(ENABLE_WEBRTC)
  46   std::map<std::string, std::string> params;
  47   if (!variations::GetVariationParams("StunProbeTrial", &params))
  48     return;
  49
  50   // The parameter, used by StartStunFieldTrial, should have the following
  51   // format: "request_per_ip/interval/sharedsocket/server1:port/server2:port/
  52   // server3:port/"
  53   std::string cmd_param = params["request_per_ip"] + "/" + params["interval"] +
  54                           "/" + params["sharedsocket"] + "/" +
  55                           params["server1"] + "/" + params["server2"] + "/" +
  56                           params["server3"] + "/";
  57
  58   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
  59       switches::kWebRtcStunProbeTrialParameter, cmd_param);
  60 #endif
  61 }
  62
  63 }  // namespace
  64
  65 void SetupDesktopFieldTrials(const base::CommandLine& parsed_command_line) {
  66   prerender::ConfigurePrerender(parsed_command_line);
  67   AutoLaunchChromeFieldTrial();
  68   SetupLightSpeedTrials();
  69   tracing::SetupBackgroundTracingFieldTrial();
  70   SetupStunProbeTrial();
  71 }
  72
  73 }  // namespace chrome