Switch CoreTabHelper to use WebContentsUserData.

chrome/browser/ui/tabs/tab_strip_model.cc

Index: chrome/browser/ui/tabs/tab_strip_model.cc
diff --git a/chrome/browser/ui/tabs/tab_strip_model.cc b/chrome/browser/ui/tabs/tab_strip_model.cc
index c622f87da28b953a5db28644bbfea2f0403e8e31..2c63cf8a8ec575109adfc6a865474344b97bfe44 100644
--- a/chrome/browser/ui/tabs/tab_strip_model.cc
+++ b/chrome/browser/ui/tabs/tab_strip_model.cc
@@ -756,8 +756,9 @@ bool TabStripModel::IsContextMenuCommandEnabled(
         TabContents* tab = GetTabContentsAt(indices[i]);
         if (tab) {
           CoreTabHelperDelegate* core_delegate =
-              tab->core_tab_helper()->delegate();
-          if (!core_delegate || core_delegate->CanReloadContents(tab))
+              CoreTabHelper::FromWebContents(tab->web_contents())->delegate();
+          if (!core_delegate ||
+              core_delegate->CanReloadContents(tab->web_contents()))
             return true;
         }
       }
@@ -822,8 +823,9 @@ void TabStripModel::ExecuteContextMenuCommand(
         TabContents* tab = GetTabContentsAt(indices[i]);
         if (tab) {
           CoreTabHelperDelegate* core_delegate =
-              tab->core_tab_helper()->delegate();
-          if (!core_delegate || core_delegate->CanReloadContents(tab))
+              CoreTabHelper::FromWebContents(tab->web_contents())->delegate();
+          if (!core_delegate ||
+              core_delegate->CanReloadContents(tab->web_contents()))
             tab->web_contents()->GetController().Reload(true);
         }
       }