Add skeletons for the factories to create the request coordinator and

chrome/browser/android/offline_pages/prerendering_offliner_factory.h

Index: chrome/browser/android/offline_pages/prerendering_offliner_factory.h
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner_factory.h b/chrome/browser/android/offline_pages/prerendering_offliner_factory.h
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+++ b/chrome/browser/android/offline_pages/prerendering_offliner_factory.h
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+// 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_FACTORY_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_FACTORY_H_
+
+#include "base/macros.h"
+#include "chrome/browser/android/offline_pages/prerendering_offliner.h"
+#include "components/offline_pages/background/offliner.h"
+#include "components/offline_pages/background/offliner_factory.h"
+#include "content/public/browser/browser_context.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace offline_pages {
+
+class OfflinerPolicy;
+class PrerenderingOffliner;
+
+// A factory to create one unique OfflinePageModel.
+class PrerenderingOfflinerFactory : public OfflinerFactory {
+ public:
+  PrerenderingOffliner* GetOffliner(const OfflinerPolicy* policy) override;
+
+  explicit PrerenderingOfflinerFactory(content::BrowserContext* context);
+  ~PrerenderingOfflinerFactory() override;
+
+ private:
+  // TODO: Do I still need a singleton?
+  friend struct base::DefaultSingletonTraits<PrerenderingOfflinerFactory>;
+
+  DISALLOW_COPY_AND_ASSIGN(PrerenderingOfflinerFactory);
+
+  PrerenderingOffliner* offliner_;
+  content::BrowserContext* context_;
+};
+
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_FACTORY_H_