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

chrome/browser/resources/print_preview/print_preview.js

Index: chrome/browser/resources/print_preview/print_preview.js
diff --git a/chrome/browser/resources/print_preview/print_preview.js b/chrome/browser/resources/print_preview/print_preview.js
index 824b5dc24883aca377b410cb559574775e2ee582..ed6eb9febfc1255d167b50b432f06f312c11a1a6 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -16,6 +16,9 @@ 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';
@@ -822,12 +825,16 @@ function setPluginPreviewPageCount() {
  * 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;