[Offline pages] Create offliner that uses background loader

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 6b3d5d594e0ee6774a4fe6954bcf5d46dd9afd5b..4c85b15a48f1ada3cde06b692a4b0d08bf09e0a3 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -3511,6 +3511,7 @@ test("unit_tests") {
   if (is_android) {
     # Offline pages are currently only on Android.
     sources += [
+      "../browser/android/offline_pages/background_loader_offliner_unittest.cc",
       "../browser/android/offline_pages/offline_page_mhtml_archiver_unittest.cc",
       "../browser/android/offline_pages/offline_page_request_job_unittest.cc",
       "../browser/android/offline_pages/offline_page_utils_unittest.cc",
@@ -3531,6 +3532,7 @@ test("unit_tests") {
       "//components/gcm_driver/instance_id/android:instance_id_driver_test_support_java",
       "//components/offline_pages:test_support",
       "//components/offline_pages/background:test_support",
+      "//components/offline_pages/content/background_loader:test_support",
       "//v8:v8_external_startup_data_assets",
     ]
     deps -= [ "//third_party/libaddressinput" ]