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

chrome/browser/android/offline_pages/prerendering_loader.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_LOADER_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_
+
+#include "base/callback.h"
+#include "components/offline_pages/background/offliner.h"
+
+class GURL;
+class PrerenderManager;
+class Profile;
+
+namespace content {
+class WebContents;
+class SessionStorageNamespace;
+}  // namespace content
+
+namespace gfx {
+class Size;
+}  // namespace gfx
+
+namespace offline_pages {
+
+// An Offliner implementation that uses the PrerenderManager for client-side
+// rendering. This handles loading a page and then saving it to the offline
+// page model.
+class PrerenderingLoader {
+ public:
+  typedef base::Callback<void(
+      Offliner::CompletionStatus,
+      content::WebContents*)> LoadPageCallback;
+
+  explicit PrerenderingLoader(Profile* profile);
+  ~PrerenderingLoader();
+
+  bool LoadPage(
+      const GURL url,
+      content::SessionStorageNamespace* session_storage_namespace,
+      const gfx::Size& size,
+      const LoadPageCallback& callback);
+
+  void StopLoad();
+
+ private:
+  // Not owned.
+  Profile* profile_;
+  PrerenderManager* manager_;
+};
+
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_LOADER_H_