Simplify infobar expiry.

chrome/browser/media/protected_media_identifier_infobar_delegate.h

Index: chrome/browser/media/protected_media_identifier_infobar_delegate.h
diff --git a/chrome/browser/media/protected_media_identifier_infobar_delegate.h b/chrome/browser/media/protected_media_identifier_infobar_delegate.h
index 700c717cdc4c37b16adfceed9d94b44f657ba4fe..1681da8d534407187f60d9b5a303d2cb4ee67f37 100644
--- a/chrome/browser/media/protected_media_identifier_infobar_delegate.h
+++ b/chrome/browser/media/protected_media_identifier_infobar_delegate.h
@@ -32,7 +32,6 @@ class ProtectedMediaIdentifierInfoBarDelegate : public ConfirmInfoBarDelegate {
   ProtectedMediaIdentifierInfoBarDelegate(PermissionQueueController* controller,
                                           const PermissionRequestID& id,
                                           const GURL& requesting_frame,
-                                          int contents_unique_id,
                                           const std::string& display_languages);
   ~ProtectedMediaIdentifierInfoBarDelegate() override;
 
@@ -44,7 +43,6 @@ class ProtectedMediaIdentifierInfoBarDelegate : public ConfirmInfoBarDelegate {
   Type GetInfoBarType() const override;
   int GetIconID() const override;
   void InfoBarDismissed() override;
-  bool ShouldExpireInternal(const NavigationDetails& details) const override;
   base::string16 GetMessageText() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
@@ -55,7 +53,6 @@ class ProtectedMediaIdentifierInfoBarDelegate : public ConfirmInfoBarDelegate {
   PermissionQueueController* controller_;
   const PermissionRequestID id_;
   GURL requesting_frame_;
-  int contents_unique_id_;
   std::string display_languages_;
 
   DISALLOW_COPY_AND_ASSIGN(ProtectedMediaIdentifierInfoBarDelegate);