Adds shells of classes (PrerenderingOffliner and PrerenderingLoader) to intergrate from Background …

chrome/browser/android/offline_pages/prerendering_offliner.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 "chrome/browser/android/offline_pages/prerendering_offliner.h"
+
+namespace offline_pages {
+
+PrerenderingOffliner::PrerenderingOffliner(PrerenderManager* prerender_manager,
+                                           OfflinePageModel* offline_page_model)
+    : loader_(new PrerenderingLoader(prerender_manager)) {}
+
+PrerenderingOffliner::~PrerenderingOffliner() {}
+
+bool PrerenderingOffliner::LoadAndSave(const SavePageRequest& request,
+                                       const CompletionCallback& callback) {
+  // TODO(dougarnett): implement.
+  return false;
+}
+
+void PrerenderingOffliner::Cancel() {
+  loader_->StopLoading();
+}
+
+}  // namespace offline_pages