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

chrome/common/print_messages.h

Index: chrome/common/print_messages.h
diff --git a/chrome/common/print_messages.h b/chrome/common/print_messages.h
index e4a4e9f9eb5418d16f8055553c23b3c51ce06e79..0b57c97a1adf48d9befb55a00c2add5d8ad09cd0 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -40,6 +40,7 @@ struct PrintMsg_Print_Params {
   std::string preview_ui_addr;
   int preview_request_id;
   bool is_first_request;
+  bool print_to_pdf;
   bool display_header_footer;
   string16 date;
   string16 title;
@@ -110,6 +111,9 @@ IPC_STRUCT_TRAITS_BEGIN(PrintMsg_Print_Params)
   // True if this is the first preview request.
   IPC_STRUCT_TRAITS_MEMBER(is_first_request)
 
+  // True if print to pdf is requested.
+  IPC_STRUCT_TRAITS_MEMBER(print_to_pdf)
+
   // Specifies if the header and footer should be rendered.
   IPC_STRUCT_TRAITS_MEMBER(display_header_footer)
 
@@ -351,8 +355,11 @@ IPC_MESSAGE_ROUTED1(PrintHostMsg_DidGetPreviewPageCount,
 
 // Notify the browser of the default page layout according to the currently
 // selected printer and page size.
-IPC_MESSAGE_ROUTED1(PrintHostMsg_DidGetDefaultPageLayout,
-                    printing::PageSizeMargins /* page layout in points */)
+// |has_custom_page_size_style| is true when the printing frame has a custom
+// page size css otherwise false.
+IPC_MESSAGE_ROUTED2(PrintHostMsg_DidGetDefaultPageLayout,
+                    printing::PageSizeMargins /* page layout in points */,
+                    bool /* has custom page size style */)
 
 // Notify the browser a print preview page has been rendered.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_DidPreviewPage,