Create distiller files for Reading List.

ios/chrome/browser/dom_distiller/favicon_web_state_dispatcher_impl.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 IOS_CHROME_BROWSER_DOM_DISTILLER_FAVICON_WEB_STATE_DISPATCHER_IMPL_H_
-#define IOS_CHROME_BROWSER_DOM_DISTILLER_FAVICON_WEB_STATE_DISPATCHER_IMPL_H_
-
-#include <memory>
-#include <vector>
-
-#include "base/memory/weak_ptr.h"
-#include "components/dom_distiller/ios/favicon_web_state_dispatcher.h"
-
-namespace web {
-class BrowserState;
-}
-
-namespace dom_distiller {
-
-// Implementation of the FaviconWebStateDispatcher.
-class FaviconWebStateDispatcherImpl : public FaviconWebStateDispatcher {
- public:
-  // Constructor for keeping the WebStates alive for |keep_alive_second|
-  // seconds. If |keep_alive_second| < 0 then the default value is used.
-  FaviconWebStateDispatcherImpl(web::BrowserState* browser_state,
-                                int64_t keep_alive_second);
-  ~FaviconWebStateDispatcherImpl() override;
-
-  // FaviconWebStateDispatcher implementation.
-  web::WebState* RequestWebState() override;
-  void ReturnWebState(web::WebState* web_state) override;
-
- private:
-  web::BrowserState* browser_state_;
-  // Map of the WebStates currently alive.
-  std::vector<std::unique_ptr<web::WebState>> web_states_;
-  // Time during which the WebState will be kept alive after being returned.
-  int64_t keep_alive_second_;
-  base::WeakPtrFactory<FaviconWebStateDispatcherImpl> weak_ptr_factory_;
-};
-
-}  // namespace dom_distiller
-
-#endif  // IOS_CHROME_BROWSER_DOM_DISTILLER_FAVICON_WEB_STATE_DISPATCHER_IMPL_H_