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

chrome/common/print_messages.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.
 
 // IPC messages for printing.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 185 matching lines @@
 IPC_STRUCT_BEGIN(PrintHostMsg_DidGetPreviewPageCount_Params)
   // Cookie for the document to ensure correctness.
   IPC_STRUCT_MEMBER(int, document_cookie)
 
   // Total page count.
   IPC_STRUCT_MEMBER(int, page_count)
 
   // Indicates whether the previewed document is modifiable.
   IPC_STRUCT_MEMBER(bool, is_modifiable)
 
+  // Indicates whether the printing frame has page size style.
+  IPC_STRUCT_MEMBER(bool, has_page_size_style)
+
   // The id of the preview request.
   IPC_STRUCT_MEMBER(int, preview_request_id)
 
   // Indicates whether the existing preview data needs to be cleared or not.
   IPC_STRUCT_MEMBER(bool, clear_preview_data)
 IPC_STRUCT_END()
 
 // Parameters to describe a rendered page.
 IPC_STRUCT_BEGIN(PrintHostMsg_DidPrintPage_Params)
   // A shared memory handle to the EMF data. This data can be quite large so a
@@ skipping 164 matching lines @@
 
 // Tell the browser print preview was cancelled.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintPreviewCancelled,
                     int /* document cookie */)
 
 // Tell the browser print preview found the selected printer has invalid
 // settings (which typically caused by disconnected network printer or printer
 // driver is bogus).
 IPC_MESSAGE_ROUTED1(PrintHostMsg_PrintPreviewInvalidPrinterSettings,
                     int /* document cookie */)