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 ed28e0540e5e5e12d3b728a8abff09ebfb61a99c..694c9227841a3f836434e35e2b39d0d27d28a7fb 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"
@@ -202,6 +203,6 @@ 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);
 }