Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/downloads/BUILD.gn

Index: components/offline_pages/downloads/BUILD.gn
diff --git a/components/offline_pages/downloads/BUILD.gn b/components/offline_pages/downloads/BUILD.gn
deleted file mode 100644
index 41f709f7d93015e9cd5923bca535f0a418a3abf6..0000000000000000000000000000000000000000
--- a/components/offline_pages/downloads/BUILD.gn
+++ /dev/null
@@ -1,44 +0,0 @@
-# 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.
-
-if (is_android) {
-  import("//build/config/android/rules.gni")
-}
-
-static_library("offline_pages_ui_adapter") {
-  sources = [
-    "download_notifying_observer.cc",
-    "download_notifying_observer.h",
-    "download_ui_adapter.cc",
-    "download_ui_adapter.h",
-    "download_ui_item.cc",
-    "download_ui_item.h",
-    "offline_page_download_notifier.h",
-  ]
-
-  deps = [
-    "//base",
-    "//components/offline_pages:offline_pages",
-    "//components/offline_pages/background:background_offliner",
-    "//url",
-  ]
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "download_notifying_observer_unittest.cc",
-    "download_ui_adapter_unittest.cc",
-  ]
-
-  deps = [
-    ":offline_pages_ui_adapter",
-    "//base",
-    "//base/test:test_support",
-    "//components/offline_pages:offline_pages",
-    "//components/offline_pages:test_support",
-    "//components/offline_pages/background:background_offliner",
-    "//testing/gtest",
-  ]
-}