diff options
Diffstat (limited to 'chrome/browser/chromeos/external_metrics.cc')
| -rw-r--r-- | chrome/browser/chromeos/external_metrics.cc | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/chrome/browser/chromeos/external_metrics.cc b/chrome/browser/chromeos/external_metrics.cc index 16b4963..c8d6033 100644 --- a/chrome/browser/chromeos/external_metrics.cc +++ b/chrome/browser/chromeos/external_metrics.cc @@ -64,8 +64,7 @@ char GetFieldTrialGroupFromFile(const std::string& name_of_experiment, DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); // The dice for this experiment have been thrown at boot. The selected group // number is stored in a file. - const base::FilePath kPathToGroupFile( - FILE_PATH_LITERAL(path_to_group_file.c_str())); + const base::FilePath kPathToGroupFile(path_to_group_file); std::string file_content; // If the file does not exist, the experiment has not started. @@ -165,32 +164,39 @@ void SetupProgressiveScanFieldTrial() { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); const char name_of_experiment[] = "ProgressiveScan"; const char path_to_group_file[] = "/home/chronos/.progressive_scan_variation"; - char group_char = GetFieldTrialGroupFromFile(name_of_experiment, - path_to_group_file); - if (!IsGroupInFieldTrial(name_of_experiment, path_to_group_file, group_char, - "c1234")) { - return; - } - - const base::FieldTrial::Probability kDivisor = 1; // on/off only. + const base::FieldTrial::Probability kDivisor = 1000; scoped_refptr<base::FieldTrial> trial = base::FieldTrialList::FactoryGetFieldTrial(name_of_experiment, kDivisor, - "default", + "Default", 2013, 12, 31, NULL); - // Assign probability of 1 to the group Chrome OS has picked. Assign 0 to - // all other choices. - trial->AppendGroup("FullScan", group_char == 'c' ? kDivisor : 0); - trial->AppendGroup("33Percent_4MinMax", group_char == '1' ? kDivisor : 0); - trial->AppendGroup("50Percent_4MinMax", group_char == '2' ? kDivisor : 0); - trial->AppendGroup("50Percent_8MinMax", group_char == '3' ? kDivisor : 0); - trial->AppendGroup("100Percent_8MinMax", group_char == '4' ? kDivisor : 0); + // Announce the groups with 0 percentage; the actual percentages come from + // the server configuration. + std::map<int, std::string> group_to_char; + group_to_char[trial->AppendGroup("FullScan", 0)] = "c"; + group_to_char[trial->AppendGroup("33Percent_4MinMax", 0)] = "1"; + group_to_char[trial->AppendGroup("50Percent_4MinMax", 0)] = "2"; + group_to_char[trial->AppendGroup("50Percent_8MinMax", 0)] = "3"; + group_to_char[trial->AppendGroup("100Percent_8MinMax", 0)] = "4"; // Announce the experiment to any listeners (especially important is the UMA // software, which will append the group names to UMA statistics). - trial->group(); - LOG(INFO) << "Configured in group '" << trial->group_name() << "' for " - << name_of_experiment << " field trial"; + const int group_num = trial->group(); + std::string group_char = "x"; + if (ContainsKey(group_to_char, group_num)) + group_char = group_to_char[group_num]; + + // Write the group to the file to be read by ChromeOS. + const base::FilePath kPathToGroupFile(path_to_group_file); + + if (file_util::WriteFile(kPathToGroupFile, group_char.c_str(), + group_char.length())) { + LOG(INFO) << "Configured in group '" << trial->group_name() + << "' ('" << group_char << "') for " + << name_of_experiment << " field trial"; + } else { + LOG(ERROR) << "Couldn't write to " << path_to_group_file; + } } } // namespace |