Update Background Fetch IDLs following spec changes

third_party/WebKit/Source/modules/modules_idl_files.gni

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 
 # The paths in this file are absolute since this file is imported and the
 # file lists must be valid from multple "current directories".
 
 bindings_modules_output_dir = "$bindings_output_dir/modules"
@@ skipping 26 matching lines @@
         modules_global_constructors_original_interfaces,
         [ "$blink_modules_output_dir/{{source_name_part}}ModulesConstructors.idl" ])
 
 modules_idl_files =
     get_path_info([
                     "app_banner/AppBannerPromptResult.idl",
                     "app_banner/BeforeInstallPromptEvent.idl",
                     "background_fetch/BackgroundFetchClickEvent.idl",
                     "background_fetch/BackgroundFetchEvent.idl",
                     "background_fetch/BackgroundFetchFailEvent.idl",
+                    "background_fetch/BackgroundFetchFetch.idl",
                     "background_fetch/BackgroundFetchManager.idl",
                     "background_fetch/BackgroundFetchRegistration.idl",
-                    "background_fetch/BackgroundFetchRequest.idl",
-                    "background_fetch/BackgroundFetchSettledRequest.idl",
+                    "background_fetch/BackgroundFetchSettledFetch.idl",
                     "background_fetch/BackgroundFetchedEvent.idl",
                     "background_sync/SyncEvent.idl",
                     "background_sync/SyncManager.idl",
                     "battery/BatteryManager.idl",
                     "bluetooth/Bluetooth.idl",
                     "bluetooth/BluetoothDevice.idl",
                     "bluetooth/BluetoothCharacteristicProperties.idl",
                     "bluetooth/BluetoothRemoteGATTCharacteristic.idl",
                     "bluetooth/BluetoothRemoteGATTDescriptor.idl",
                     "bluetooth/BluetoothRemoteGATTServer.idl",
@@ skipping 958 matching lines @@
   "$blink_modules_output_dir/websockets/CloseEventInit.h",
   "$blink_modules_output_dir/webusb/USBConnectionEventInit.cpp",
   "$blink_modules_output_dir/webusb/USBConnectionEventInit.h",
   "$blink_modules_output_dir/webusb/USBControlTransferParameters.cpp",
   "$blink_modules_output_dir/webusb/USBControlTransferParameters.h",
   "$blink_modules_output_dir/webusb/USBDeviceFilter.cpp",
   "$blink_modules_output_dir/webusb/USBDeviceFilter.h",
   "$blink_modules_output_dir/webusb/USBDeviceRequestOptions.cpp",
   "$blink_modules_output_dir/webusb/USBDeviceRequestOptions.h",
 ]