Ask for notification permission during extension installation.

chrome/common/extensions/permissions/chrome_permission_message_rules.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 "chrome/common/extensions/permissions/chrome_permission_message_rules.h"
 
 #include "base/macros.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 460 matching lines @@
        {APIPermission::kBluetoothDevices},
        {}},
       {IDS_EXTENSION_PROMPT_WARNING_BLUETOOTH_PRIVATE,
        {APIPermission::kBluetoothPrivate},
        {}},
       {IDS_EXTENSION_PROMPT_WARNING_SERIAL, {APIPermission::kSerial}, {}},
       // Universal 2nd Factor devices.
       {IDS_EXTENSION_PROMPT_WARNING_U2F_DEVICES,
        {APIPermission::kU2fDevices},
        {}},
+      // Notifications.
+      {IDS_EXTENSION_PROMPT_WARNING_NOTIFICATIONS,
+       {APIPermission::kNotifications},
+       {}},
 
       // Accessibility features.
       {IDS_EXTENSION_PROMPT_WARNING_ACCESSIBILITY_FEATURES_READ_MODIFY,
        {APIPermission::kAccessibilityFeaturesModify,
         APIPermission::kAccessibilityFeaturesRead},
        {}},
       {IDS_EXTENSION_PROMPT_WARNING_ACCESSIBILITY_FEATURES_MODIFY,
        {APIPermission::kAccessibilityFeaturesModify},
        {}},
       {IDS_EXTENSION_PROMPT_WARNING_ACCESSIBILITY_FEATURES_READ,
@@ skipping 155 matching lines @@
       {IDS_EXTENSION_PROMPT_WARNING_DISPLAY_SOURCE,
        {APIPermission::kDisplaySource},
        {}},
   };
 
   return std::vector<ChromePermissionMessageRule>(
       rules_arr, rules_arr + arraysize(rules_arr));
 }
 
 }  // namespace extensions