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

chrome/browser/android/offline_pages/prerendering_offliner.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_
+
+#include "chrome/browser/android/offline_pages/prerendering_loader.h"
+#include "components/offline_pages/background/offliner.h"
+#include "components/offline_pages/offline_page_model.h"
+
+class PrerenderManager;
+
+namespace content {
+class WebContents;
+}  // namespace content
+
+namespace offline_pages {
+
+// An Offliner implementation that attempts client-side rendering and saving
+// of an offline page. It uses the PrerenderingLoader to load the page and
+// the OfflinePageModel to save it.
+class PrerenderingOffliner : public Offliner {
+ public:
+  PrerenderingOffliner(PrerenderManager* prerender_manager,
+                       OfflinePageModel* offline_page_model);
+  ~PrerenderingOffliner() override;
+
+  bool LoadAndSave(const SavePageRequest& request,
+                   const CompletionCallback& callback) override;
+
+  void Cancel() override;
+
+ private:
+  std::unique_ptr<PrerenderingLoader> loader_;
+};
+
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_