Adds a field trial to control Web API kill switches.

chrome/browser/permissions/permission_context_uma_util.h

 // Copyright 2014 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_CONTEXT_UMA_UTIL_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_CONTEXT_UMA_UTIL_H_
 
 #include "base/logging.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 
 class GURL;
 class Profile;
 
 // Provides a convenient way of logging UMA for permission related
 // operations.
 class PermissionContextUmaUtil {
  public:
   static void PermissionRequested(ContentSettingsType permission,
                                   const GURL& requesting_origin,
                                   const GURL& embedding_origin,
                                   Profile* profile);
   static void PermissionGranted(ContentSettingsType permission,
                                 const GURL& requesting_origin);
   static void PermissionDenied(ContentSettingsType permission,
                                const GURL& requesting_origin);
   static void PermissionDismissed(ContentSettingsType permission,
                                   const GURL& requesting_origin);
   static void PermissionIgnored(ContentSettingsType permission,
                                 const GURL& requesting_origin);
+  static const std::string GetPermissionString(ContentSettingsType permission);

[mlamouri (slow - plz ping), 2015/10/09 12:07:54]

I don't think this needs to be part of the class. Are you using any member in
the implementation?

[kcarattini, 2015/10/12 03:58:06]

No, that's why it is static. None of the other methods declared here use member
variables (in fact there aren't any member variables), so I viewed this class as
a collection of related methods to do with PermissionContext. With that
definition, do you disagree that it should be part of the class?

 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PermissionContextUmaUtil);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_CONTEXT_UMA_UTIL_H_