Implement UMA log throttling for cellular connections

components/metrics/metrics_service.cc

Index: components/metrics/metrics_service.cc
diff --git a/components/metrics/metrics_service.cc b/components/metrics/metrics_service.cc
index d17911a0bf9c259e20748f11b2b3720e8fb32a5b..913251fa55fd366c1c9146194dcb75f60bc96746 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -149,6 +149,7 @@
 #include "base/tracked_objects.h"
 #include "base/values.h"
 #include "build/build_config.h"
+#include "components/metrics/metrics_data_use_measurements.h"
 #include "components/metrics/metrics_log.h"
 #include "components/metrics/metrics_log_manager.h"
 #include "components/metrics/metrics_log_uploader.h"
@@ -305,6 +306,7 @@ MetricsService::MetricsService(MetricsStateManager* state_manager,
   int64_t install_date = local_state_->GetInt64(prefs::kInstallDate);
   if (install_date == 0)
     local_state_->SetInt64(prefs::kInstallDate, base::Time::Now().ToTimeT());
+  MetricsDataUseMeasurements::Initialize(local_state_);
 }
 
 MetricsService::~MetricsService() {
@@ -866,7 +868,11 @@ void MetricsService::SendNextLog() {
   }
   if (!log_manager_.has_staged_log())
     log_manager_.StageNextLogForUpload();
-  SendStagedLog();
+  if (MetricsDataUseMeasurements::GetInstance()->CanUploadUMALog(
+          log_manager_.staged_log_hash().size()))
+    SendStagedLog();
+  else
+    scheduler_->UploadCancelled();
 }
 
 bool MetricsService::ProvidersHaveInitialStabilityMetrics() {