Add a "Simplify Page" option to the print preview dialog

components/dom_distiller/content/dom_distiller_viewer_source.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 COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_
 #define COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 12 matching lines @@
 // Serves HTML and resources for viewing distilled articles.
 class DomDistillerViewerSource : public content::URLDataSource {
  public:
   DomDistillerViewerSource(
       DomDistillerServiceInterface* dom_distiller_service,
       const std::string& scheme,
       scoped_ptr<ExternalFeedbackReporter> external_reporter);
   ~DomDistillerViewerSource() override;
 
   class RequestViewerHandle;
+  class PrintPreviewRequestViewerHandle;
 
   // Overridden from content::URLDataSource:
   std::string GetSource() const override;
   void StartDataRequest(
       const std::string& path,
       int render_process_id,
       int render_frame_id,
       const content::URLDataSource::GotDataCallback& callback) override;
   std::string GetMimeType(const std::string& path) const override;
   bool ShouldServiceRequest(const net::URLRequest* request) const override;
@@ skipping 14 matching lines @@
 
   // A means for starting/opening an external service for feedback reporting.
   scoped_ptr<ExternalFeedbackReporter> external_feedback_reporter_;
 
   DISALLOW_COPY_AND_ASSIGN(DomDistillerViewerSource);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CONTENT_DOM_DISTILLER_VIEWER_SOURCE_H_