net: networking optimizations

features:
- early connection
- memory cache
- caching of redirection
- request queue priority
- closing unused sockets
- SHUTR
- fin aggregation
- object prefetch
- dns host name prioritization

Change-Id: Ief90b8206ba48115eaeb12d554424d65f36427ac

2 files changed, 7 insertions, 41 deletions

diff --git a/chrome/browser/net/preconnect.cc b/chrome/browser/net/preconnect.cc
index b5fd87b..e6c1fd4 100644
--- a/chrome/browser/net/preconnect.cc
+++ b/chrome/browser/net/preconnect.cc
@@ -1,4 +1,5 @@
 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011, 2012 Code Aurora Forum. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -32,12 +33,11 @@ void PreconnectOnUIThread(
   return;
 }
 
-
 void PreconnectOnIOThread(
     const GURL& url,
     UrlInfo::ResolutionMotivation motivation,
     int count) {
-  net::URLRequestContextGetter* getter = Profile::GetDefaultRequestContext();
+  URLRequestContextGetter* getter = Profile::GetDefaultRequestContext();
   if (!getter)
     return;
   if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
@@ -53,26 +53,9 @@ void PreconnectOnIOThread(
   net::HttpTransactionFactory* factory = context->http_transaction_factory();
   net::HttpNetworkSession* session = factory->GetSession();
 
-  net::HttpRequestInfo request_info;
-  request_info.url = url;
-  request_info.method = "GET";
-  request_info.extra_headers.SetHeader(net::HttpRequestHeaders::kUserAgent,
-                                       context->GetUserAgent(url));
-  // It almost doesn't matter whether we use net::LOWEST or net::HIGHEST
-  // priority here, as we won't make a request, and will surrender the created
-  // socket to the pool as soon as we can.  However, we would like to mark the
-  // speculative socket as such, and IF we use a net::LOWEST priority, and if
-  // a navigation asked for a socket (after us) then it would get our socket,
-  // and we'd get its later-arriving socket, which might make us record that
-  // the speculation didn't help :-/.  By using net::HIGHEST, we ensure that
-  // a socket is given to us if "we asked first" and this allows us to mark it
-  // as speculative, and better detect stats (if it gets used).
-  // TODO(jar): histogram to see how often we accidentally use a previously-
-  // unused socket, when a previously used socket was available.
-  request_info.priority = net::HIGHEST;
-
   // Translate the motivation from UrlRequest motivations to HttpRequest
   // motivations.
+  net::HttpRequestInfo::RequestMotivation motivation_;
   switch (motivation) {
     case UrlInfo::OMNIBOX_MOTIVATED:
       request_info.motivation = net::HttpRequestInfo::OMNIBOX_MOTIVATED;
@@ -90,18 +73,7 @@ void PreconnectOnIOThread(
       break;
   }
 
-  // Setup the SSL Configuration.
-  net::SSLConfig ssl_config;
-  session->ssl_config_service()->GetSSLConfig(&ssl_config);
-  if (session->http_stream_factory()->next_protos())
-    ssl_config.next_protos = *session->http_stream_factory()->next_protos();
-
-  // All preconnects should perform EV certificate verification.
-  ssl_config.verify_ev_cert = true;
-
-  net::HttpStreamFactory* http_stream_factory = session->http_stream_factory();
-  http_stream_factory->PreconnectStreams(
-      count, request_info, ssl_config, net::BoundNetLog());
+  net::Preconnect::DoPreconnect(session, url, count, motivation_);
 }
 
 }  // namespace chrome_browser_net
diff --git a/chrome/browser/net/preconnect.h b/chrome/browser/net/preconnect.h
index 056d5d6..0d7ed21 100644
--- a/chrome/browser/net/preconnect.h
+++ b/chrome/browser/net/preconnect.h
@@ -1,23 +1,18 @@
 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011, Code Aurora Forum. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// A Preconnect instance maintains state while a TCP/IP connection is made, and
-// and then released into the pool of available connections for future use.
-
 #ifndef CHROME_BROWSER_NET_PRECONNECT_H_
 #define CHROME_BROWSER_NET_PRECONNECT_H_
 #pragma once
 
-#include "chrome/browser/net/url_info.h"
+#include "net/http/preconnect.h"
 
-class GURL;
+#include "chrome/browser/net/url_info.h"
 
 namespace chrome_browser_net {
 
-// Try to preconnect.  Typically motivated by OMNIBOX to reach search service.
-// |count| may be used to request more than one connection be established in
-// parallel.
 void PreconnectOnUIThread(const GURL& url,
                           UrlInfo::ResolutionMotivation motivation,
                           int count);
@@ -28,7 +23,6 @@ void PreconnectOnUIThread(const GURL& url,
 void PreconnectOnIOThread(const GURL& url,
                           UrlInfo::ResolutionMotivation motivation,
                           int count);
-
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_PRECONNECT_H_