Move infobar handling to a tab helper.

chrome/browser/extensions/extension_disabled_infobar_delegate.cc

Index: chrome/browser/extensions/extension_disabled_infobar_delegate.cc
diff --git a/chrome/browser/extensions/extension_disabled_infobar_delegate.cc b/chrome/browser/extensions/extension_disabled_infobar_delegate.cc
index 6dbd444786c310ba51304f068b1fb7c567eab72c..ef8999e27af0697240849eb21fb4d4df99d00650 100644
--- a/chrome/browser/extensions/extension_disabled_infobar_delegate.cc
+++ b/chrome/browser/extensions/extension_disabled_infobar_delegate.cc
@@ -9,6 +9,7 @@
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/tab_contents/confirm_infobar_delegate.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
@@ -183,8 +184,8 @@ void ShowExtensionDisabledUI(ExtensionService* service, Profile* profile,
   if (!tab_contents)
     return;
 
-  tab_contents->AddInfoBar(new ExtensionDisabledInfobarDelegate(
-      tab_contents, service, extension));
+  tab_contents->infobar_tab_helper()->AddInfoBar(
+      new ExtensionDisabledInfobarDelegate(tab_contents, service, extension));
 }
 
 void ShowExtensionDisabledDialog(ExtensionService* service, Profile* profile,