Introduce InfoBarTabService API.

chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc

Index: chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc
diff --git a/chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc b/chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc
index 07ae2a873e118cbf77e03ab853970bd8dfb8e0cf..ef10231dad268e9fd791e531be69f17fd5444f2d 100644
--- a/chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc
+++ b/chrome/browser/ui/gtk/infobars/extension_infobar_gtk.cc
@@ -7,6 +7,7 @@
 #include "base/debug/trace_event.h"
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/extensions/extension_host.h"
+#include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 #include "chrome/browser/ui/gtk/custom_button.h"
@@ -201,6 +202,6 @@ gboolean ExtensionInfoBarGtk::OnExpose(GtkWidget* sender,
   return FALSE;
 }
 
-InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
-  return new ExtensionInfoBarGtk(owner, this);
+InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(InfoBarTabService* owner) {
+  return new ExtensionInfoBarGtk(static_cast<InfoBarTabHelper*>(owner), this);
 }