Simplify infobar expiry.

chrome/browser/media/midi_permission_infobar_delegate.cc

Index: chrome/browser/media/midi_permission_infobar_delegate.cc
diff --git a/chrome/browser/media/midi_permission_infobar_delegate.cc b/chrome/browser/media/midi_permission_infobar_delegate.cc
index a90cdf6ffe82ca3c3247109a4ba40c071363e6ba..5a590cdccb85bf14f7011fafc3faa2fd6fa9736c 100644
--- a/chrome/browser/media/midi_permission_infobar_delegate.cc
+++ b/chrome/browser/media/midi_permission_infobar_delegate.cc
@@ -4,14 +4,9 @@
 
 #include "chrome/browser/media/midi_permission_infobar_delegate.h"
 
-#include "chrome/browser/content_settings/permission_queue_controller.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/grit/generated_resources.h"
-#include "chrome/grit/locale_settings.h"
-#include "components/content_settings/core/common/permission_request_id.h"
 #include "components/infobars/core/infobar.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/web_contents.h"
 #include "grit/theme_resources.h"
 #include "net/base/net_util.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -24,20 +19,15 @@ infobars::InfoBar* MidiPermissionInfoBarDelegate::Create(
     const GURL& requesting_frame,
     const std::string& display_languages,
     ContentSettingsType type) {
-  const content::NavigationEntry* committed_entry =
-      infobar_service->web_contents()->GetController().GetLastCommittedEntry();
   return infobar_service->AddInfoBar(infobar_service->CreateConfirmInfoBar(
       scoped_ptr<ConfirmInfoBarDelegate>(new MidiPermissionInfoBarDelegate(
-          controller, id, requesting_frame,
-          committed_entry ? committed_entry->GetUniqueID() : 0,
-          display_languages, type))));
+          controller, id, requesting_frame, display_languages, type))));
 }
 
 MidiPermissionInfoBarDelegate::MidiPermissionInfoBarDelegate(
     PermissionQueueController* controller,
     const PermissionRequestID& id,
     const GURL& requesting_frame,
-    int contents_unique_id,
     const std::string& display_languages,
     ContentSettingsType type)
     : PermissionInfobarDelegate(controller, id, requesting_frame, type),