net: remove DNS certificate checking code.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index c31dfd9b163f5ff2870257f2436fc9b736b3cee8..3d4314e048623a016fce8b9a58d397f3ba353920 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -52,8 +52,6 @@
 #include "chrome/browser/metrics/thread_watcher.h"
 #include "chrome/browser/metrics/tracking_synchronizer.h"
 #include "chrome/browser/nacl_host/nacl_process_host.h"
-#include "chrome/browser/net/chrome_dns_cert_provenance_checker.h"
-#include "chrome/browser/net/chrome_dns_cert_provenance_checker_factory.h"
 #include "chrome/browser/net/chrome_net_log.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
@@ -282,8 +280,6 @@ void InitializeNetworkOptions(const CommandLine& parsed_command_line) {
     net::SpdySessionPool::set_max_sessions_per_domain(value);
   }
 
-  SetDnsCertProvenanceCheckerFactory(CreateChromeDnsCertProvenanceChecker);
-
   if (parsed_command_line.HasSwitch(switches::kEnableWebSocketOverSpdy)) {
     // Enable WebSocket over SPDY.
     net::WebSocketJob::set_websocket_over_spdy_enabled(true);