[Offline pages] Create offliner that uses background loader

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 8d49c7940e2763a2d7ecee20e4dcb5be2e1069ec..9b71caf72cba9337173d99bf724768f7ef996e02 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -1355,6 +1355,7 @@ split_static_library("browser") {
     "//components/ntp_tiles",
     "//components/offline_pages",
     "//components/offline_pages/background:background_offliner",
+    "//components/offline_pages/content/background_loader",
     "//components/offline_pages/downloads:offline_pages_ui_adapter",
     "//components/offline_pages/request_header:request_header",
     "//components/omnibox/browser",
@@ -3133,6 +3134,8 @@ split_static_library("browser") {
       "android/ntp/ntp_snippets_launcher.h",
       "android/ntp/popular_sites.cc",
       "android/ntp/popular_sites.h",
+      "android/offline_pages/background_loader_offliner.cc",
+      "android/offline_pages/background_loader_offliner.h",
       "android/offline_pages/background_scheduler_bridge.cc",
       "android/offline_pages/background_scheduler_bridge.h",
       "android/offline_pages/downloads/offline_page_download_bridge.cc",