Add a feature to display a persistence toggle for permission prompts on Android.

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"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "url/gurl.h"
 
 class Profile;
 
 namespace content {
 enum class PermissionType;
 }  // namespace content
 
 enum class PermissionSourceUI;
 
+// This enum backs a UMA histogram, so it must be treated as append-only.
+enum PermissionAction {
+  GRANTED = 0,
+  DENIED = 1,
+  DISMISSED = 2,
+  IGNORED = 3,
+  REVOKED = 4,
+  REENABLED = 5,
+  REQUESTED = 6,
+
+  // Always keep this at the end.
+  PERMISSION_ACTION_NUM,
+};
+
 struct PermissionTypeHash {
   std::size_t operator()(const content::PermissionType& type) const;
 };
 
 // A utility class for permissions.
 class PermissionUtil {
  public:
   // Returns the permission string for the given PermissionType.
   static std::string GetPermissionString(content::PermissionType permission);
 
@@ skipping 32 matching lines @@
     ContentSettingsType content_type_;
     PermissionSourceUI source_ui_;
     bool is_initially_allowed_;
   };
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PermissionUtil);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_UTIL_H_