diff options
Diffstat (limited to 'chrome/browser/metrics/metrics_service.h')
| -rw-r--r-- | chrome/browser/metrics/metrics_service.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/chrome/browser/metrics/metrics_service.h b/chrome/browser/metrics/metrics_service.h index aa4bf9e..ff2d5eb 100644 --- a/chrome/browser/metrics/metrics_service.h +++ b/chrome/browser/metrics/metrics_service.h @@ -16,6 +16,7 @@ #include "base/gtest_prod_util.h" #include "base/memory/scoped_ptr.h" #include "base/memory/weak_ptr.h" +#include "base/metrics/field_trial.h" #include "base/process_util.h" #include "chrome/browser/metrics/metrics_log.h" #include "chrome/browser/metrics/tracking_synchronizer_observer.h" @@ -86,16 +87,21 @@ class MetricsService // recording is not currently running. std::string GetClientId(); - // Returns the preferred entropy source used to seed persistent activities - // based on whether or not metrics reporting will permitted on this client. + // Returns the preferred entropy provider used to seed persistent activities + // based on whether or not metrics reporting will be permitted on this client. // The caller must determine if metrics reporting will be enabled for this - // client and pass that state in as |reporting_will_be_enabled|. If - // |reporting_will_be_enabled| is true, this method returns the client ID - // concatenated with the low entropy source. Otherwise, this method just - // returns the low entropy source. Note that this reporting state can not be - // checked by reporting_active() because this method may need to be called - // before the MetricsService needs to be started. - std::string GetEntropySource(bool reporting_will_be_enabled); + // client and pass that state in as |reporting_will_be_enabled|. + // + // If |reporting_will_be_enabled| is true, this method returns an entropy + // provider that has a high source of entropy, partially based on the client + // ID. Otherwise, an entropy provider that is based on a low entropy source + // is returned. + // + // Note that this reporting state can not be checked by reporting_active() + // because this method may need to be called before the MetricsService needs + // to be started. + scoped_ptr<const base::FieldTrial::EntropyProvider> CreateEntropyProvider( + bool reporting_will_be_enabled); // Force the client ID to be generated. This is useful in case it's needed // before recording. |