Use low entropy for studies that send experiment IDs to Google properties.

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 9f88769cc26e57f89c3e0214b61bac77219e350e..5fa079f3ed43a96145b7c35f05acfe5d501bc7ea 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -383,7 +383,7 @@ std::unique_ptr<const base::FieldTrial::EntropyProvider>
 MetricsService::CreateEntropyProvider() {
   // TODO(asvitkine): Refactor the code so that MetricsService does not expose
   // this method.
-  return state_manager_->CreateEntropyProvider();
+  return state_manager_->CreateDefaultEntropyProvider();
 }
 
 void MetricsService::EnableRecording() {