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..67f69502da2bae7b972ac7cfe475c51477fdbf58 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -709,14 +709,20 @@ void ResourceLoader::CallDidFinishLoading() {
 }
 
 void ResourceLoader::RecordHistograms() {
+  ResourceRequestInfoImpl* info = GetRequestInfo();
   if (request_->response_info().network_accessed) {
-    UMA_HISTOGRAM_ENUMERATION("Net.HttpResponseInfo.ConnectionInfo",
-                              request_->response_info().connection_info,
-                              net::HttpResponseInfo::NUM_OF_CONNECTION_INFOS);
+    if (info->GetResourceType() == RESOURCE_TYPE_MAIN_FRAME) {
+      UMA_HISTOGRAM_ENUMERATION("Net.HttpResponseInfo.ConnectionInfo.MainFrame",
+                                request_->response_info().connection_info,
+                                net::HttpResponseInfo::NUM_OF_CONNECTION_INFOS);
+    } else {
+      UMA_HISTOGRAM_ENUMERATION(
+          "Net.HttpResponseInfo.ConnectionInfo.SubResource",
+          request_->response_info().connection_info,
+          net::HttpResponseInfo::NUM_OF_CONNECTION_INFOS);
+    }
   }
 
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
   if (info->GetResourceType() == RESOURCE_TYPE_PREFETCH) {
     PrefetchStatus status = STATUS_UNDEFINED;
     TimeDelta total_time = base::TimeTicks::Now() - request_->creation_time();