[Offline pages] Empty RequestQueue and SavePageRequest

components/offline_pages/background/BUILD.gn

 # 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")
 }
 
 # GYP: //components/offline_pages/offline_pages.gypi:background_offliner
 static_library("background_offliner") {
   sources = [
     "offliner.h",
     "request_coordinator.cc",
     "request_coordinator.h",
+    "request_queue.cc",
+    "request_queue.h",
+    "save_page_request.cc",
+    "save_page_request.h",
     "scheduler.h",
   ]
 
   deps = [
     "//base",
     "//components/offline_pages:offline_pages",
     "//net",
     "//url",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "save_page_request_unittest.cc",
+  ]
+
+  deps = [
+    ":background_offliner",
+    "//base",
+    "//components/offline_pages:offline_pages",
+    "//testing/gtest",
+    "//url",
+  ]
+}