Switch LoadTimeStatsTabHelper to use WebContentsUserData.

chrome/browser/ui/tab_contents/tab_contents.h

Index: chrome/browser/ui/tab_contents/tab_contents.h
diff --git a/chrome/browser/ui/tab_contents/tab_contents.h b/chrome/browser/ui/tab_contents/tab_contents.h
index 9fb341ff43790eef8c9dc640f4edff226610886c..1a8394d30a11414eee216592c0482ffd62b2a2c7 100644
--- a/chrome/browser/ui/tab_contents/tab_contents.h
+++ b/chrome/browser/ui/tab_contents/tab_contents.h
@@ -91,10 +91,6 @@ class SearchTabHelper;
 }
 }
 
-namespace chrome_browser_net {
-class LoadTimeStatsTabHelper;
-}
-
 namespace chromeos {
 class SimpleWebViewDialog;
 class WebUILoginView;
@@ -321,8 +317,6 @@ class TabContents : public content::WebContentsObserver {
   scoped_ptr<AutomationTabHelper> automation_tab_helper_;
   scoped_ptr<BlockedContentTabHelper> blocked_content_tab_helper_;
   scoped_ptr<BookmarkTabHelper> bookmark_tab_helper_;
-  scoped_ptr<chrome_browser_net::LoadTimeStatsTabHelper>
-  load_time_stats_tab_helper_;
 #if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
   scoped_ptr<captive_portal::CaptivePortalTabHelper> captive_portal_tab_helper_;
 #endif