Index: chrome/browser/metrics/variations/variations_service.cc |
diff --git a/chrome/browser/metrics/variations/variations_service.cc b/chrome/browser/metrics/variations/variations_service.cc |
index 00c7816705d3638bc190824bbf3f7101bc93150f..54165c907d2565e214777bfeac826651388f2f55 100644 |
--- a/chrome/browser/metrics/variations/variations_service.cc |
+++ b/chrome/browser/metrics/variations/variations_service.cc |
@@ -177,6 +177,19 @@ bool VariationsService::CreateTrialsFromSeed() { |
} |
} |
+ // Log the "freshness" of the seed that was just used. The freshness is the |
+ // time between the last successful seed download and now. |
+ const int64 last_fetch_time_internal = |
+ local_state_->GetInt64(prefs::kVariationsLastFetchTime); |
+ if (last_fetch_time_internal) { |
+ const base::Time now = base::Time::Now(); |
+ const base::TimeDelta delta = |
+ now - base::Time::FromInternalValue(last_fetch_time_internal); |
+ // Log the value in number of minutes. |
+ UMA_HISTOGRAM_CUSTOM_COUNTS("Variations.SeedFreshness", delta.InMinutes(), |
+ 1, base::TimeDelta::FromDays(30).InMinutes(), 50); |
+ } |
+ |
return true; |
} |
@@ -215,6 +228,7 @@ void VariationsService::RegisterPrefs(PrefRegistrySimple* registry) { |
registry->RegisterStringPref(prefs::kVariationsSeed, std::string()); |
registry->RegisterInt64Pref(prefs::kVariationsSeedDate, |
base::Time().ToInternalValue()); |
+ registry->RegisterInt64Pref(prefs::kVariationsLastFetchTime, 0); |
} |
// static |
@@ -288,6 +302,10 @@ void VariationsService::OnURLFetchComplete(const net::URLFetcher* source) { |
base::TimeDelta::FromMilliseconds(kServerTimeResolutionMs), |
latency); |
} |
+ |
+ // Record the time of the most recent successful fetch. |
+ local_state_->SetInt64(prefs::kVariationsLastFetchTime, |
Alexei Svitkine (slow)
2013/02/22 18:46:51
Hmm, one little issue with doing this here is that
SteveT
2013/02/22 20:15:36
What do you think of this latest change? Another o
|
+ base::Time::Now().ToInternalValue()); |
} |
if (response_code != net::HTTP_OK) { |