Update from https://crrev.com/329939

base/metrics/histogram_base.cc

Index: base/metrics/histogram_base.cc
diff --git a/base/metrics/histogram_base.cc b/base/metrics/histogram_base.cc
index f09c84e20d0968262c8ec338c8691d9863b3b0d6..de34c79d4b4bfde9b063654e17e7db2cc880f38c 100644
--- a/base/metrics/histogram_base.cc
+++ b/base/metrics/histogram_base.cc
@@ -111,8 +111,8 @@ void HistogramBase::WriteJSON(std::string* output) const {
   root.SetInteger("count", count);
   root.SetDouble("sum", static_cast<double>(sum));
   root.SetInteger("flags", flags());
-  root.Set("params", parameters.release());
-  root.Set("buckets", buckets.release());
+  root.Set("params", parameters.Pass());
+  root.Set("buckets", buckets.Pass());
   root.SetInteger("pid", GetCurrentProcId());
   serializer.Serialize(root);
 }