Add skeletons for the factories to create the request coordinator and

chrome/browser/android/offline_pages/prerendering_offliner_factory.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_factory.h"
+
+#include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
+#include "chrome/browser/android/offline_pages/prerendering_offliner.h"
+
+namespace offline_pages {
+
+class OfflinerPolicy;
+
+PrerenderingOfflinerFactory::PrerenderingOfflinerFactory(
+    content::BrowserContext* context) {
+  offliner_ = nullptr;
+  context_ = context;
+}
+
+PrerenderingOfflinerFactory::~PrerenderingOfflinerFactory() {
+  delete offliner_;
+}
+
+// static
+Offliner* PrerenderingOfflinerFactory::GetOffliner(
+    const OfflinerPolicy* policy) {
+  // TODO(petewil): Think about whether there might be any threading
+  // issues.  This should always happen on the same thread, but make sure.
+
+  // Build a prerendering offliner if we don't already have one cached.
+  if (offliner_ == nullptr) {
+    // TODO(petewil): Create a PrerenderManager, use for 2nd arg below.
+
+    // Get a pointer to the (unowned) offline page model.
+    OfflinePageModel* model =
+        OfflinePageModelFactory::GetInstance()->GetForBrowserContext(context_);
+
+    offliner_ = new PrerenderingOffliner(policy, nullptr, model);
+  }
+
+  return offliner_;
+}
+
+}  // namespace offline_pages