Create distiller files for Reading List.

ios/chrome/browser/dom_distiller/distiller_viewer.h

 // Copyright 2015 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_DISTILLER_VIEWER_H_
 #define IOS_CHROME_BROWSER_DOM_DISTILLER_DISTILLER_VIEWER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 33 matching lines @@
       const dom_distiller::DistilledArticleProto* article_proto) override = 0;
 
   void SendJavaScript(const std::string& buffer) override = 0;
 
   DISALLOW_COPY_AND_ASSIGN(DistillerViewerInterface);
 };
 
 // A very simple and naive implementation of the DistillerViewer.
 class DistillerViewer : public DistillerViewerInterface {
  public:
+  // Creates a |DistillerView| that will be used to distill |url|.
+  // If |factory| is not null, it will be used to create the DistillerPage that
+  // will load the URL and distill the page. If |factory| is null, the default
+  // factory of |distillerService| will be used.
+  // |callback| is called when distillation is finished with the protobuf
+  // containing the distilled page.
   DistillerViewer(dom_distiller::DomDistillerService* distillerService,
                   PrefService* prefs,
                   const GURL& url,
-                  const DistillationFinishedCallback& callback);
+                  const DistillationFinishedCallback& callback,
+                  const DistillerPageFactory* factory);
   ~DistillerViewer() override;
 
   void OnArticleReady(
       const dom_distiller::DistilledArticleProto* article_proto) override;
 
   void SendJavaScript(const std::string& buffer) override;
 
  private:
   // The url of the distilled page.
   const GURL url_;
   // JavaScript buffer.
   std::string js_buffer_;
   // Callback to run once distillation is complete.
   const DistillationFinishedCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DistillerViewer);
 };
 
 }  // namespace dom_distiller
 
 #endif  // IOS_CHROME_BROWSER_DOM_DISTILLER_DISTILLER_VIEWER_H_