Make the launch params the default client behavior for UMA 3g

components/metrics/data_use_tracker.cc

Index: components/metrics/data_use_tracker.cc
diff --git a/components/metrics/data_use_tracker.cc b/components/metrics/data_use_tracker.cc
index 6e3f9b3eb8afd6b77022a3094d01de6216951e6b..738656c8acf45c6edef78c66dac6e84c54b587c1 100644
--- a/components/metrics/data_use_tracker.cc
+++ b/components/metrics/data_use_tracker.cc
@@ -14,6 +14,9 @@
 
 namespace metrics {
 
+const int kDefaultUMAWeeklyQuotaBytes = 204800;

[Alexei Svitkine (slow), 2016/05/13 18:37:13]

Nit: Put these in the anon namespace below. Add comments.

[gayane -on leave until 09-2017, 2016/05/13 19:17:01]

Done.

+const double kDefaultUMARatio = 0.05;
+
 namespace {
 
 // This function is for forwarding metrics usage pref changes to the appropriate
@@ -170,23 +173,36 @@ int DataUseTracker::ComputeTotalDataUse(const std::string& pref_name) {
 bool DataUseTracker::GetUmaWeeklyQuota(int* uma_weekly_quota_bytes) const {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  // If user is not in the experiment then there shouldn't be any limitations.
+  std::string experiment_group =
+      base::FieldTrialList::FindFullName("UMA_EnableCellularLogUpload");
+  if (experiment_group.empty())
+    return false;
+
   std::string param_value_str = variations::GetVariationParamValue(
       "UMA_EnableCellularLogUpload", "Uma_Quota");
   if (param_value_str.empty())
-    return false;
-
-  base::StringToInt(param_value_str, uma_weekly_quota_bytes);
+    *uma_weekly_quota_bytes = kDefaultUMAWeeklyQuotaBytes;
+  else
+    base::StringToInt(param_value_str, uma_weekly_quota_bytes);
   return true;
 }
 
 bool DataUseTracker::GetUmaRatio(double* ratio) const {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  // If user is not in the experiment then there shouldn't be any limitations.
+  std::string experiment_group =
+      base::FieldTrialList::FindFullName("UMA_EnableCellularLogUpload");
+  if (experiment_group.empty())
+    return false;
+
   std::string param_value_str = variations::GetVariationParamValue(
       "UMA_EnableCellularLogUpload", "Uma_Ratio");
   if (param_value_str.empty())
-    return false;
-  base::StringToDouble(param_value_str, ratio);
+    *ratio = kDefaultUMARatio;
+  else
+    base::StringToDouble(param_value_str, ratio);
   return true;
 }