Check frame before generation print preview.

chrome/renderer/printing/print_web_view_helper.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_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 119 matching lines @@
       const PageSizeMargins& page_layout_in_points,
       gfx::Size* page_size,
       gfx::Rect* content_area);
 
   // Update |ignore_css_margins_| based on settings.
   void UpdateFrameMarginsCssInfo(const base::DictionaryValue& settings);
 
   // Returns true if the current destination printer is PRINT_TO_PDF.
   bool IsPrintToPdfRequested(const base::DictionaryValue& settings);
 
-  // Returns the print scaling option to retain/scale/crop the source page size
-  // to fit the printable area of the paper.
-  //
-  // We retain the source page size when the current destination printer is
-  // SAVE_AS_PDF.
-  //
-  // We crop the source page size to fit the printable area or we print only the
-  // left top page contents when
-  // (1) Source is PDF and the user has requested not to fit to printable area
-  // via |job_settings|.
-  // (2) Source is PDF. This is the first preview request and print scaling
-  // option is disabled for initiator renderer plugin.
-  //
-  // In all other cases, we scale the source page to fit the printable area.
-  blink::WebPrintScalingOption GetPrintScalingOption(
-      bool source_is_html,
-      const base::DictionaryValue& job_settings,
-      const PrintMsg_Print_Params& params);
-
   // Initiate print preview.
   void OnInitiatePrintPreview(bool selection_only);
 
   // Start the process of generating a print preview using |settings|.
   void OnPrintPreview(const base::DictionaryValue& settings);
 
   // Prepare frame for creating preview document.
   void PrepareFrameForPreviewDocument();
 
   // Continue creating preview document.
@@ skipping 311 matching lines @@
   PrintPreviewContext print_preview_context_;
   bool is_loading_;
   bool is_scripted_preview_delayed_;
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_