Apply performance-for-range-copy fixes.

This CL has been generated running https://clang.llvm.org/extra/clang-tidy/checks/performance-for-range-copy.html.

Bug: None
Change-Id: Ia9f6c91776fc8b3ab28fba87ba8ce112f87d5cf0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172805
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30996}
diff --git a/media/engine/webrtc_video_engine.cc b/media/engine/webrtc_video_engine.cc
index a19d444..fc9a843 100644
--- a/media/engine/webrtc_video_engine.cc
+++ b/media/engine/webrtc_video_engine.cc
@@ -830,7 +830,7 @@
       return;
     }
 
-    for (VideoCodecSettings codec_setting : negotiated_codecs_) {
+    for (const VideoCodecSettings& codec_setting : negotiated_codecs_) {
       if (codec_setting.codec.name == conf.codec_name) {
         if (conf.param) {
           auto it = codec_setting.codec.params.find(*conf.param);
diff --git a/pc/data_channel_controller.cc b/pc/data_channel_controller.cc
index 2800992..e9ea742 100644
--- a/pc/data_channel_controller.cc
+++ b/pc/data_channel_controller.cc
@@ -222,7 +222,7 @@
       data_channel_transport_invoker_->AsyncInvoke<void>(
           RTC_FROM_HERE, signaling_thread(), [this] {
             RTC_DCHECK_RUN_ON(signaling_thread());
-            for (auto channel : sctp_data_channels_) {
+            for (const auto& channel : sctp_data_channels_) {
               channel->OnTransportChannelCreated();
             }
           });
diff --git a/pc/jsep_transport_controller.cc b/pc/jsep_transport_controller.cc
index 0687a06..4a0df7a 100644
--- a/pc/jsep_transport_controller.cc
+++ b/pc/jsep_transport_controller.cc
@@ -1456,7 +1456,7 @@
 void JsepTransportController::OnDataChannelTransportNegotiated_n(
     cricket::JsepTransport* transport,
     DataChannelTransportInterface* data_channel_transport) {
-  for (auto it : mid_to_transport_) {
+  for (const auto& it : mid_to_transport_) {
     if (it.second == transport) {
       config_.transport_observer->OnTransportChanged(
           it.first, transport->rtp_transport(), transport->RtpDtlsTransport(),
diff --git a/sdk/android/src/jni/android_network_monitor.cc b/sdk/android/src/jni/android_network_monitor.cc
index 5c9cf54..0b1a443 100644
--- a/sdk/android/src/jni/android_network_monitor.cc
+++ b/sdk/android/src/jni/android_network_monitor.cc
@@ -403,7 +403,7 @@
   network_info_by_handle_.clear();
   RTC_LOG(LS_INFO) << "Android network monitor found " << network_infos.size()
                    << " networks";
-  for (NetworkInformation network : network_infos) {
+  for (const NetworkInformation& network : network_infos) {
     OnNetworkConnected_w(network);
   }
 }
diff --git a/test/pc/e2e/sdp/sdp_changer.cc b/test/pc/e2e/sdp/sdp_changer.cc
index 69035d5..f2aeb1b 100644
--- a/test/pc/e2e/sdp/sdp_changer.cc
+++ b/test/pc/e2e/sdp/sdp_changer.cc
@@ -28,7 +28,7 @@
 std::string CodecRequiredParamsToString(
     const std::map<std::string, std::string>& codec_required_params) {
   rtc::StringBuilder out;
-  for (auto entry : codec_required_params) {
+  for (const auto& entry : codec_required_params) {
     out << entry.first << "=" << entry.second << ";";
   }
   return out.str();
@@ -47,7 +47,7 @@
     RTC_LOG(INFO) << "Codec: " << codec.name;
     if (!codec.parameters.empty()) {
       RTC_LOG(INFO) << "Params:";
-      for (auto param : codec.parameters) {
+      for (const auto& param : codec.parameters) {
         RTC_LOG(INFO) << "  " << param.first << "=" << param.second;
       }
     }
@@ -62,7 +62,7 @@
         continue;
       }
       bool parameters_matched = true;
-      for (auto item : codec_request.required_params) {
+      for (const auto& item : codec_request.required_params) {
         auto it = codec.parameters.find(item.first);
         if (it == codec.parameters.end()) {
           parameters_matched = false;
@@ -131,7 +131,7 @@
       media_desc->set_simulcast_description(simulcast_description);
 
       info.simulcast_description = media_desc->simulcast_description();
-      for (auto extension : media_desc->rtp_header_extensions()) {
+      for (const auto& extension : media_desc->rtp_header_extensions()) {
         if (extension.uri == RtpExtension::kMidUri) {
           info.mid_extension = extension;
         } else if (extension.uri == RtpExtension::kRidUri) {
@@ -443,7 +443,7 @@
     // but it have to have receive layers instead of send. So we need to put
     // send layers from offer to receive layers in answer.
     cricket::SimulcastDescription simulcast_description;
-    for (auto layer : info.simulcast_description.send_layers()) {
+    for (const auto& layer : info.simulcast_description.send_layers()) {
       simulcast_description.receive_layers().AddLayerWithAlternatives(layer);
     }
     media_desc->set_simulcast_description(simulcast_description);