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

chrome/browser/ui/webui/print_preview/print_preview_handler.h

 // Copyright (c) 2012 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_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/printing/print_view_manager_observer.h"
+#include "chrome/browser/ui/webui/print_preview/hidden_print_preview.h"
 #include "components/signin/core/browser/gaia_cookie_manager_service.h"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 #if defined(ENABLE_SERVICE_DISCOVERY)
 #include "chrome/browser/local_discovery/privet_local_printer_lister.h"
 #include "chrome/browser/local_discovery/service_discovery_shared_client.h"
 #endif  // ENABLE_SERVICE_DISCOVERY
 
 class PrinterHandler;
@@ skipping 301 matching lines @@
   void OnGotExtensionPrinterCapabilities(
       const std::string& printer_id,
       const base::DictionaryValue& capabilities);
 
   // Called when an extension print job is completed.
   // |success|: Whether the job succeeded.
   // |status|: The returned print job status. Useful for reporting a specific
   //     error.
   void OnExtensionPrintResult(bool success, const std::string& status);
 
+  // Called when the DOM Distiller determines whether or not this page can
+  // be distilled.
+  // |distillable|: Whether or not this page can be distilled.
+  void HandleIsPageDistillableResult(bool distillable);
+
   // Register/unregister from notifications of changes done to the GAIA
   // cookie.
   void RegisterForGaiaCookieChanges();
   void UnregisterForGaiaCookieChanges();
 
   // The underlying dialog object.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
   // A count of how many requests received to regenerate preview data.
   // Initialized to 0 then incremented and emitted to a histogram.
@@ skipping 36 matching lines @@
 #endif
 
   // Handles requests for extension printers. Created lazily by calling
   // |EnsureExtensionPrinterHandlerSet|.
   scoped_ptr<PrinterHandler> extension_printer_handler_;
 
   // Notifies tests that want to know if the PDF has been saved. This doesn't
   // notify the test if it was a successful save, only that it was attempted.
   base::Closure pdf_file_saved_closure_;
 
+  // A hidden print preview that is responsible for rendering the page
+  // after being processed by the DOM Distiller.
+  scoped_ptr<HiddenPrintPreview> hidden_print_preview_;
+
   base::WeakPtrFactory<PrintPreviewHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_