Improve syncing between dom distiller and the print preview request

chrome/browser/dom_distiller/lazy_dom_distiller_service.h

 // Copyright 2014 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_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_
 #define CHROME_BROWSER_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_
 
 #include "base/macros.h"
 #include "components/dom_distiller/core/dom_distiller_service.h"
 #include "components/dom_distiller/core/task_tracker.h"
@@ skipping 31 matching lines @@
   bool HasEntry(const std::string& entry_id) override;
   std::string GetUrlForEntry(const std::string& entry_id) override;
   std::vector<ArticleEntry> GetEntries() const override;
   scoped_ptr<ArticleEntry> RemoveEntry(const std::string& entry_id) override;
   scoped_ptr<ViewerHandle> ViewEntry(ViewRequestDelegate* delegate,
                                      scoped_ptr<DistillerPage> distiller_page,
                                      const std::string& entry_id) override;
   scoped_ptr<ViewerHandle> ViewUrl(ViewRequestDelegate* delegate,
                                    scoped_ptr<DistillerPage> distiller_page,
                                    const GURL& url) override;
+  scoped_ptr<ViewerHandle> AddViewRequestDelegate(ViewRequestDelegate* delegate,
+                                                  const GURL& url) override;
   scoped_ptr<DistillerPage> CreateDefaultDistillerPage(
       const gfx::Size& render_view_size) override;
   scoped_ptr<DistillerPage> CreateDefaultDistillerPageWithHandle(
       scoped_ptr<SourcePageHandle> handle) override;
   void AddObserver(DomDistillerObserver* observer) override;
   void RemoveObserver(DomDistillerObserver* observer) override;
   DistilledPagePrefs* GetDistilledPagePrefs() override;
 
  private:
   // Accessor method for the backing service instance.
@@ skipping 13 matching lines @@
 
   // Used to track when the profile is shut down.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(LazyDomDistillerService);
 };
 
 }  // namespace dom_distiller
 
 #endif  // CHROME_BROWSER_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_