Remove dead DocumentState metrics tracking code

content/public/renderer/document_state.cc

Index: content/public/renderer/document_state.cc
diff --git a/content/public/renderer/document_state.cc b/content/public/renderer/document_state.cc
index 53265e1049cc7f41964da2511036aed183dadcb8..283e0d89e061e24dfe19c0bd428391f07118b98d 100644
--- a/content/public/renderer/document_state.cc
+++ b/content/public/renderer/document_state.cc
@@ -9,14 +9,11 @@
 namespace content {
 
 DocumentState::DocumentState()
-    : load_histograms_recorded_(false),
-      web_timing_histograms_recorded_(false),
-      was_fetched_via_spdy_(false),
+    : was_fetched_via_spdy_(false),
       was_alpn_negotiated_(false),
       was_alternate_protocol_available_(false),
       connection_info_(net::HttpResponseInfo::CONNECTION_INFO_UNKNOWN),
       was_load_data_with_base_url_request_(false),
-      load_type_(UNDEFINED_LOAD),
       can_load_local_resources_(false) {}
 
 DocumentState::~DocumentState() {}