Make lint errors fatal in presubmit and fix files in whitelisted paths

webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc

Index: webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc b/webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc
index 485f7522a0ef54d29c401b19fe55e013361d17b9..cff7e70c5d38b002bcb40b4bb017640b9ba77288 100644
--- a/webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc
+++ b/webrtc/modules/remote_bitrate_estimator/bwe_simulations.cc
@@ -66,10 +66,10 @@ TEST_P(BweSimulation, Verizon4gDownlinkTest) {
   AdaptiveVideoSource source(0, 30, 300, 0, 0);
   VideoSender sender(&downlink_, &source, GetParam());
   RateCounterFilter counter1(&downlink_, 0, "sender_output",
-                             bwe_names[GetParam()] + "_up");
+                             std::string() + bwe_names[GetParam()] + "_up");
   TraceBasedDeliveryFilter filter(&downlink_, 0, "link_capacity");
   RateCounterFilter counter2(&downlink_, 0, "Receiver",
-                             bwe_names[GetParam()] + "_down");
+                             std::string() + bwe_names[GetParam()] + "_down");
   PacketReceiver receiver(&downlink_, 0, GetParam(), true, true);
   ASSERT_TRUE(filter.Init(test::ResourcePath("verizon4g-downlink", "rx")));
   RunFor(22 * 60 * 1000);