Revert CL 117933003. Re-add resource speculative prefetching code.

chrome/browser/ui/tab_helpers.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/ui/tab_helpers.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/history/history_tab_helper.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/net/net_error_tab_helper.h"
 #include "chrome/browser/password_manager/chrome_password_manager_client.h"
+#include "chrome/browser/predictors/resource_prefetch_predictor_factory.h"
+#include "chrome/browser/predictors/resource_prefetch_predictor_tab_helper.h"
 #include "chrome/browser/prerender/prerender_tab_helper.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/tab_contents/navigation_metrics_recorder.h"
 #include "chrome/browser/translate/chrome_translate_client.h"
 #include "chrome/browser/ui/autofill/chrome_autofill_client.h"
 #include "chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 #include "chrome/browser/ui/navigation_correction_tab_observer.h"
 #include "chrome/browser/ui/pdf/chrome_pdf_web_contents_helper_client.h"
@@ skipping 195 matching lines @@
   // happens to be already connected.
   if (OneClickSigninHelper::CanOffer(web_contents,
                                      OneClickSigninHelper::CAN_OFFER_FOR_ALL,
                                      std::string(),
                                      NULL)) {
     OneClickSigninHelper::CreateForWebContentsWithPasswordManager(
         web_contents,
         ChromePasswordManagerClient::GetManagerFromWebContents(web_contents));
   }
 #endif
+
+  if (predictors::ResourcePrefetchPredictorFactory::GetForProfile(
+      web_contents->GetBrowserContext())) {
+    predictors::ResourcePrefetchPredictorTabHelper::CreateForWebContents(
+        web_contents);
+  }
 }