update printing code from upstream

Fix nwjs#1545

Author: rogerwang

src/common/print_messages.cc

@@ -27,7 +27,6 @@ PrintMsg_Print_Params::PrintMsg_Print_Params()
     print_scaling_option(WebKit::WebPrintScalingOptionSourceSize),
     print_to_pdf(false),
     display_header_footer(false),
-    date(),
     title(),
     url(),
     should_print_backgrounds(false) {
@@ -54,7 +53,6 @@ void PrintMsg_Print_Params::Reset() {
   print_scaling_option = WebKit::WebPrintScalingOptionSourceSize;
   print_to_pdf = false;
   display_header_footer = false;
-  date = string16();
   title = string16();
   url = string16();
   should_print_backgrounds = false;

src/common/print_messages.h

@@ -45,7 +45,6 @@ struct PrintMsg_Print_Params {
   WebKit::WebPrintScalingOption print_scaling_option;
   bool print_to_pdf;
   bool display_header_footer;
-  string16 date;
   string16 title;
   string16 url;
   bool should_print_backgrounds;
@@ -137,9 +136,6 @@ IPC_STRUCT_TRAITS_BEGIN(PrintMsg_Print_Params)
   // Specifies if the header and footer should be rendered.
   IPC_STRUCT_TRAITS_MEMBER(display_header_footer)
 
-  // Date string to be printed as header if requested by the user.
-  IPC_STRUCT_TRAITS_MEMBER(date)
-
   // Title string to be printed as header if requested by the user.
   IPC_STRUCT_TRAITS_MEMBER(title)