Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/api/infobars/simple_alert_infobar_delegate.cc

Index: chrome/browser/api/infobars/simple_alert_infobar_delegate.cc
===================================================================
--- chrome/browser/api/infobars/simple_alert_infobar_delegate.cc	(revision 175396)
+++ chrome/browser/api/infobars/simple_alert_infobar_delegate.cc	(working copy)
@@ -4,8 +4,19 @@
 
 #include "chrome/browser/api/infobars/simple_alert_infobar_delegate.h"
 
+#include "chrome/browser/api/infobars/infobar_service.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
+// static
+void SimpleAlertInfoBarDelegate::Create(InfoBarService* infobar_service,
+                                        gfx::Image* icon,
+                                        const string16& message,
+                                        bool auto_expire) {
+  infobar_service->AddInfoBar(scoped_ptr<InfoBarDelegate>(
+      new SimpleAlertInfoBarDelegate(infobar_service, icon, message,
+                                     auto_expire)));
+}
+
 SimpleAlertInfoBarDelegate::SimpleAlertInfoBarDelegate(
     InfoBarService* infobar_service,
     gfx::Image* icon,