offline_items_collection : Added helper class to determine progress

components/offline_items_collection/core/BUILD.gn

 # Copyright 2017 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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 static_library("core") {
   sources = [
     "offline_content_aggregator.cc",
     "offline_content_aggregator.h",
     "offline_content_provider.h",
     "offline_item.cc",
     "offline_item.h",
     "offline_item_filter.h",
+    "offline_item_progress_unit.h",
     "offline_item_state.h",
     "throttled_offline_content_provider.cc",
     "throttled_offline_content_provider.h",
   ]
 
   public_deps = [
     "//base",
     "//components/keyed_service/core",
     "//ui/gfx",
     "//url",
@@ skipping 64 matching lines @@
     ]
 
     jni_package = "components/offline_items_collection/core/android"
   }
 
   java_cpp_enum("jni_enums") {
     visibility = [ ":*" ]
 
     sources = [
       "offline_item_filter.h",
+      "offline_item_progress_unit.h",
       "offline_item_state.h",
     ]
   }
 }