IOS distiller common code

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"
+#include "components/dom_distiller/core/dom_distiller_request_view_base.h"
 #include "components/dom_distiller/core/task_tracker.h"
 
 class GURL;
 
 namespace ios {
 class ChromeBrowserState;
 }
 
 namespace dom_distiller {
 
 class DistilledPagePrefs;
 
 // A very simple and naive implementation of the dom_distiller
 // ViewRequestDelegate: From an URL it builds an HTML string and notifies when
 // finished.
-class DistillerViewer : public dom_distiller::ViewRequestDelegate {
+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;
 
-  // ViewRequestDelegate.
-  void OnArticleUpdated(
-      dom_distiller::ArticleDistillationUpdate article_update) override {}
-  void OnArticleReady(const DistilledArticleProto* article_proto) override;
+  void SendJavaScript(const std::string& buffer) override;
+
+  std::string GetJavaScriptBuffer();
 
  private:
   // The url of the distilled page.
   const GURL url_;
-  // Callback to invoke when the page is finished.
-  DistillationFinishedCallback callback_;
   // Interface for accessing preferences for distilled pages.
   scoped_ptr<DistilledPagePrefs> distilled_page_prefs_;
-  // Keeps the distiller going until the view is released.
-  scoped_ptr<dom_distiller::ViewerHandle> viewer_handle_;
+  // JavaScript buffer.
+  std::string js_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(DistillerViewer);
 };
 
 }  // namespace dom_distiller
 
 #endif  // IOS_CHROME_BROWSER_DOM_DISTILLER_DISTILLER_VIEWER_H_