[Policy Experimental] Add policies to allow Cookies and Pop-ups exceptions.

components/content_settings/core/common/pref_names.cc

 // 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.
 
 #include "components/content_settings/core/common/pref_names.h"
 
 namespace prefs {
 
-// Boolean that is true if we should unconditionally block third-party cookies,
-// regardless of other content settings.
+// Boolean that is true if we should block third-party cookies, subject to
+// cookies content settings.
 const char kBlockThirdPartyCookies[] = "profile.block_third_party_cookies";
 
 // Version of the pattern format used to define content settings.
 const char kContentSettingsVersion[] = "profile.content_settings.pref_version";
 
 // Integer that specifies the index of the tab the user was on when they
 // last visited the content settings window.
 const char kContentSettingsWindowLastTabIndex[] =
     "content_settings_window.last_tab_index";
 
@@ skipping 48 matching lines @@
     "profile.managed_plugins_blocked_for_urls";
 const char kManagedPopupsAllowedForUrls[] =
     "profile.managed_popups_allowed_for_urls";
 const char kManagedPopupsBlockedForUrls[] =
     "profile.managed_popups_blocked_for_urls";
 const char kManagedKeygenAllowedForUrls[] =
     "profile.managed_keygen_allowed_for_urls";
 const char kManagedKeygenBlockedForUrls[] =
     "profile.managed_keygen_blocked_for_urls";
 
+// Preferences that are exclusively used to store managed values to control
+// pref exceptions in content settings.
+const char kUserCookiesExceptionsUsage[] =
+    "profile.user_exceptions_usage.cookies";
+const char kUserPopupsExceptionsUsage[] =
+    "profile.user_exceptions_usage.popups";
+
 }  // namespace prefs