Convert JsonWriter::Write to taking a const ref for the in-param

components/proximity_auth/client.cc

Index: components/proximity_auth/client.cc
diff --git a/components/proximity_auth/client.cc b/components/proximity_auth/client.cc
index a0b6a06545f081dfa652da82d11d06376e1d8100..255b6f677e54f39d628e94e3c345c8658278d6ef 100644
--- a/components/proximity_auth/client.cc
+++ b/components/proximity_auth/client.cc
@@ -37,7 +37,7 @@ const char kUnlockEventName[] = "easy_unlock";
 // Serializes the |value| to a JSON string and returns the result.
 std::string SerializeValueToJson(const base::Value& value) {
   std::string json;
-  base::JSONWriter::Write(&value, &json);
+  base::JSONWriter::Write(value, &json);
   return json;
 }