[Offline pages] Create offliner that uses background loader

components/offline_pages/content/background_loader/background_loader_contents_stub.cc

+// 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.
+
+#include "components/offline_pages/content/background_loader/background_loader_contents_stub.h"
+
+#include "content/public/test/web_contents_tester.h"
+
+namespace background_loader {
+
+BackgroundLoaderContentsStub::BackgroundLoaderContentsStub(
+    content::BrowserContext* browser_context) : BackgroundLoaderContents() {
+  BackgroundLoaderContents::web_contents_.reset(
+      content::WebContentsTester::CreateTestWebContents(browser_context, NULL);
+}
+
+BackgroundLoaderContentsStub::~BackgroundLoaderContentsStub() {}
+
+void BackgroundLoaderContentsStub::LoadPage(const GURL& url) {
+  // does nothing.
+}
+
+} // namespace background_loader