Added chrome-side support for link rel=preconnect

components/network_hints/renderer/renderer_dns_prefetch.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See header file for description of RendererDnsPrefetch class
 
 #include "components/network_hints/renderer/renderer_dns_prefetch.h"
 
 #include <ctype.h>
 
@@ skipping 128 matching lines @@
       if (1 == max_count) break;
       --max_count;
       DCHECK_GE(max_count, 1u);
     }
   }
   DCHECK_GE(new_name_count_, names.size());
   new_name_count_ -= names.size();
 
   network_hints::LookupRequest request;
   request.hostname_list = names;
-  RenderThread::Get()->Send(new DnsPrefetchMsg_RequestPrefetch(request));
+  RenderThread::Get()->Send(new NetworkHintsMsg_DNSPrefetch(request));
 }
 
 // is_numeric_ip() checks to see if all characters in name are either numeric,
 // or dots.  Such a name will not actually be passed to DNS, as it is an IP
 // address.
 bool RendererDnsPrefetch::is_numeric_ip(const char* name, size_t length) {
   // Scan for a character outside our lookup list.
   while (length-- > 0) {
     if (!isdigit(*name) && '.' != *name)
       return false;
     ++name;
   }
   return true;
 }
 
 }  // namespcae predictor