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

chrome/browser/ui/tab_helpers.cc

Index: chrome/browser/ui/tab_helpers.cc
diff --git a/chrome/browser/ui/tab_helpers.cc b/chrome/browser/ui/tab_helpers.cc
index 797bb3af6cc18848227beabf3ff625276421d288..036271bd0622c3925e7163acf9595ad38541bfdf 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -12,6 +12,8 @@
 #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"
@@ -227,4 +229,10 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
         ChromePasswordManagerClient::GetManagerFromWebContents(web_contents));
   }
 #endif
+
+  if (predictors::ResourcePrefetchPredictorFactory::GetForProfile(
+      web_contents->GetBrowserContext())) {
+    predictors::ResourcePrefetchPredictorTabHelper::CreateForWebContents(
+        web_contents);
+  }
 }