Eliminate InfoBarTabHelper. Make InfoBarService a concrete class.

chrome/browser/ui/extensions/app_metro_infobar_delegate_win.cc

Index: chrome/browser/ui/extensions/app_metro_infobar_delegate_win.cc
===================================================================
--- chrome/browser/ui/extensions/app_metro_infobar_delegate_win.cc	(revision 195254)
+++ chrome/browser/ui/extensions/app_metro_infobar_delegate_win.cc	(working copy)
@@ -93,7 +93,7 @@
 
 bool AppMetroInfoBarDelegateWin::Accept() {
   PrefService* prefs = g_browser_process->local_state();
-  content::WebContents* web_contents = owner()->GetWebContents();
+  content::WebContents* web_contents = owner()->web_contents();
   if (mode_ == SHOW_APP_LIST) {
     prefs->SetBoolean(prefs::kRestartWithAppList, true);
   } else {
@@ -108,7 +108,7 @@
 }
 
 bool AppMetroInfoBarDelegateWin::Cancel() {
-  owner()->GetWebContents()->Close();
+  owner()->web_contents()->Close();
   return false;
 }
 
@@ -123,7 +123,7 @@
       content::Referrer(),
       (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
       content::PAGE_TRANSITION_LINK, false);
-  owner()->GetWebContents()->OpenURL(params);
+  owner()->web_contents()->OpenURL(params);
   return false;
 }