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

chrome/browser/android/offline_pages/prerendering_loader.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_loader.h"
+
+#include "content/public/browser/web_contents.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace offline_pages {
+
+PrerenderingLoader::PrerenderingLoader(PrerenderManager* prerender_manager)
+    : prerender_manager_(prerender_manager) {
+}
+
+PrerenderingLoader::~PrerenderingLoader() {
+}
+
+bool PrerenderingLoader::LoadPage(
+    const GURL& url,
+    content::SessionStorageNamespace* session_storage_namespace,
+    const gfx::Size& size,
+    const LoadPageCallback& callback) {
+  // TODO(dougarnett): implement.
+  return false;
+}
+
+void PrerenderingLoader::StopLoading() {
+  // TODO(dougarnett): implement.
+}
+
+}  // namespace offline_pages