Clean up the PermissionInfoBarDelegate hierarchy.

chrome/browser/permissions/permission_util.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PERMISSIONS_PERMISSION_UTIL_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_UTIL_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 35 matching lines @@
 
   // Limited conversion of ContentSettingsType to PermissionType. Intended for
   // recording Permission UMA metrics from areas of the codebase which have not
   // yet been converted to PermissionType. Returns true if the conversion was
   // performed.
   // TODO(tsergeant): Remove this function once callsites operate on
   // PermissionType directly.
   static bool GetPermissionType(ContentSettingsType type,
                                 content::PermissionType* out);
 
+  static bool ShouldShowPersistenceToggle();
+
   // A scoped class that will check the current resolved content setting on
   // construction and report a revocation metric accordingly if the revocation
   // condition is met (from ALLOW to something else).
   class ScopedRevocationReporter {
    public:
     ScopedRevocationReporter(Profile* profile,
                              const GURL& primary_url,
                              const GURL& secondary_url,
                              ContentSettingsType content_type,
                              PermissionSourceUI source_ui);
@@ skipping 13 matching lines @@
     ContentSettingsType content_type_;
     PermissionSourceUI source_ui_;
     bool is_initially_allowed_;
   };
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PermissionUtil);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_UTIL_H_