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

net/http/http_stream_parser.cc

Index: net/http/http_stream_parser.cc
diff --git a/net/http/http_stream_parser.cc b/net/http/http_stream_parser.cc
index 57ef06a34ad38ab6e533d555ddef86212cde8d8e..cb7036a7daeaa1d2aac43f916524a01995e57ab5 100644
--- a/net/http/http_stream_parser.cc
+++ b/net/http/http_stream_parser.cc
@@ -1000,7 +1000,11 @@ int HttpStreamParser::ParseResponseHeaders(int end_offset) {
     return ERR_RESPONSE_HEADERS_MULTIPLE_LOCATION;
 
   response_->headers = headers;
-  response_->connection_info = HttpResponseInfo::CONNECTION_INFO_HTTP1;
+  if (headers->GetHttpVersion() == HttpVersion(0, 9)) {
+    response_->connection_info = HttpResponseInfo::CONNECTION_INFO_HTTP0_9;
+  } else {
+    response_->connection_info = HttpResponseInfo::CONNECTION_INFO_HTTP1;
+  }
   response_->vary_data.Init(*request_, *response_->headers);
   DVLOG(1) << __FUNCTION__ << "()"
            << " content_length = \"" << response_->headers->GetContentLength()