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

net/http/http_basic_stream.cc

Index: net/http/http_basic_stream.cc
diff --git a/net/http/http_basic_stream.cc b/net/http/http_basic_stream.cc
index 9ebb5e32d866ee7c31ac007f112050d688cffd19..a82f9fccaf464981a25ce659987e62f673c886fb 100644
--- a/net/http/http_basic_stream.cc
+++ b/net/http/http_basic_stream.cc
@@ -124,7 +124,9 @@ void HttpBasicStream::Drain(HttpNetworkSession* session) {
 }
 
 void HttpBasicStream::PopulateNetErrorDetails(NetErrorDetails* details) {
-  details->connection_info = HttpResponseInfo::CONNECTION_INFO_HTTP1;
+  // TODO(mmenke):  Consumers don't actually care about HTTP version, but seems
+  // like the right version should be reported, if headers were received.
+  details->connection_info = HttpResponseInfo::CONNECTION_INFO_HTTP1_1;

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

This is really weird, and should be fixed.  Unfortunately, we have no access to
the HttpResponseInfo here.  We do own the HttpStreamParser, but it doesn't
actually even own the structure, so by accessing it here, we'd be adding
lifetime requirements...And the one consumer of this data just wants to know if
this is HTTP/0.9 or HTTP/1.x.

   return;
 }