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

chrome/browser/resources/print_preview/print_preview.js

 // 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.
 
 // require: cr/ui/print_preview_cloud.js
 
 var localStrings = new LocalStrings();
 
 // If useCloudPrint is true we attempt to connect to cloud print
 // and populate the list of printers with cloud print printers.
 var useCloudPrint = false;
 
 // Store the last selected printer index.
 var lastSelectedPrinterIndex = 0;
 
 // Used to disable some printing options when the preview is not modifiable.
 var previewModifiable = false;
 
+// Used to identify whether the printing frame has specific page size style.
+var hasPageSizeStyle = false;
+
 // Destination list special value constants.
 const MANAGE_CLOUD_PRINTERS = 'manageCloudPrinters';
 const MANAGE_LOCAL_PRINTERS = 'manageLocalPrinters';
 const SIGN_IN = 'signIn';
 const PRINT_TO_PDF = 'Print to PDF';
 const PRINT_WITH_CLOUD_PRINT = 'printWithCloudPrint';
 
 // State of the print preview settings.
 var printSettings = new PrintSettings();
 
@@ skipping 786 matching lines @@
 function setPluginPreviewPageCount() {
   $('pdf-viewer').printPreviewPageCount(
       pageSettings.previouslySelectedPages.length);
 }
 
 /**
  * Update the page count and check the page range.
  * Called from PrintPreviewUI::OnDidGetPreviewPageCount().
  * @param {number} pageCount The number of pages.
  * @param {number} previewResponseId The preview request id that resulted in
- *     this response.
+ *      this response.
+ * @param {boolean} hasCustomPageSizeStyle Indicates whether the previewed
+ *      document has a custom page size style.
  */
-function onDidGetPreviewPageCount(pageCount, previewResponseId) {
+function onDidGetPreviewPageCount(pageCount, previewResponseId,
+                                  hasCustomPageSizeStyle) {
   if (!isExpectedPreviewResponse(previewResponseId))
     return;
   pageSettings.updateState(pageCount);
+  hasPageSizeStyle = hasCustomPageSizeStyle;
   if (!previewModifiable && pageSettings.requestPrintPreviewIfNeeded())
     return;
 
   cr.dispatchSimpleEvent(document, customEvents.UPDATE_SUMMARY);
 }
 
 /**
  * @param {printing::PageSizeMargins} pageLayout The default layout of the page
  *     in points.
  */
@@ skipping 304 matching lines @@
 <include src="copies_settings.js"/>
 <include src="header_footer_settings.js"/>
 <include src="layout_settings.js"/>
 <include src="color_settings.js"/>
 <include src="margin_settings.js"/>
 <include src="margin_textbox.js"/>
 <include src="margin_utils.js"/>
 <include src="margins_ui.js"/>
 <include src="margins_ui_pair.js"/>
 <include src="preview_area.js"/>