PrintPreview: Honor the print media page size and margin values.

chrome/browser/ui/webui/print_preview_ui.h

 // Copyright (c) 2011 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_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_
 #pragma once
 
 #include <string>
 
@@ skipping 61 matching lines @@
   // Notifies the Web UI to show the system dialog.
   void OnShowSystemDialog();
 
   // Notifies the Web UI about the page count of the request preview.
   void OnDidGetPreviewPageCount(
       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
 
   // Notifies the Web UI of the default page layout according to the currently
   // selected printer and page size.
   void OnDidGetDefaultPageLayout(
-      const printing::PageSizeMargins& page_layout);
+      const printing::PageSizeMargins& page_layout,
+      bool has_custom_page_size_style);
 
   // Notifies the Web UI that the 0-based page |page_number| has been rendered.
   // |preview_request_id| indicates wich request resulted in this response.
   void OnDidPreviewPage(int page_number, int preview_request_id);
 
   // Notifies the Web UI renderer that preview data is available.
   // |expected_pages_count| specifies the total number of pages.
   // |preview_request_id| indicates which request resulted in this response.
   void OnPreviewDataIsAvailable(int expected_pages_count,
                                 int preview_request_id);
@@ skipping 74 matching lines @@
   // Keeps track of whether OnClosePrintPreviewTab() has been called or not.
   bool tab_closed_;
 
   // True if the user visited the page directly, false if it's a live UI.
   bool is_dummy_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_