Show template before distiller finishes

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 <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
 class DistillerViewer : public DomDistillerRequestViewBase {
  public:
   typedef base::Callback<void(const GURL&, const std::string&)>
       DistillationFinishedCallback;
 
   DistillerViewer(ios::ChromeBrowserState* browser_state,
                   const GURL& url,
                   const DistillationFinishedCallback& callback);
   ~DistillerViewer() override;
 
+  void OnArticleReady(
+      const dom_distiller::DistilledArticleProto* article_proto) override;
+
   void SendJavaScript(const std::string& buffer) override;
 
-  std::string getJsBuffer();
-
  private:
   // The url of the distilled page.
   const GURL url_;
-  // Interface for accessing preferences for distilled pages.
-  scoped_ptr<DistilledPagePrefs> distilled_page_prefs_;
   // 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_