Add metrics to track HTTP/0.9 usage for main frames and subresources

content/browser/loader/resource_loader.cc

Index: content/browser/loader/resource_loader.cc
diff --git a/content/browser/loader/resource_loader.cc b/content/browser/loader/resource_loader.cc
index 8c05ad21940fde80d31acd1a3a251237c4b9dc9c..3ae7756bbccb62dfe28fc99a938fab81191a3233 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -717,6 +717,16 @@ void ResourceLoader::RecordHistograms() {
 
   ResourceRequestInfoImpl* info = GetRequestInfo();
 
+  if (info->GetResourceType() == RESOURCE_TYPE_MAIN_FRAME) {
+    UMA_HISTOGRAM_ENUMERATION("Net.HttpResponseInfo.ConnectionInfo.SubResource",

[Bence, 2016/06/30 21:20:11]

I think you got the two branches backwards.

[mmenke, 2016/06/30 22:18:07]

Thanks for catching that!  Done.

+                              request_->response_info().connection_info,
+                              net::HttpResponseInfo::NUM_OF_CONNECTION_INFOS);
+  } else {
+    UMA_HISTOGRAM_ENUMERATION("Net.HttpResponseInfo.ConnectionInfo.MainFrame",
+                              request_->response_info().connection_info,
+                              net::HttpResponseInfo::NUM_OF_CONNECTION_INFOS);
+  }
+
   if (info->GetResourceType() == RESOURCE_TYPE_PREFETCH) {
     PrefetchStatus status = STATUS_UNDEFINED;
     TimeDelta total_time = base::TimeTicks::Now() - request_->creation_time();