Added Header and Footer support using Skia

printing/print_job_constants.cc

Index: printing/print_job_constants.cc
diff --git a/printing/print_job_constants.cc b/printing/print_job_constants.cc
index d8eb0ce3c2b99d4ce32bc794c7adb4d4243496f7..d1d72c1fa58e118653d8c40f6580a7eeb9ad142f 100644
--- a/printing/print_job_constants.cc
+++ b/printing/print_job_constants.cc
@@ -39,4 +39,15 @@ const char kSettingPrinterName[] = "printerName";
 // Print to PDF option: true if selected, false if not.
 const char kSettingPrintToPDF[] = "printToPDF";
 
+// Option to print Headers and Footers: true if selected, false if not.
+const char kSettingHeaderFooter[] = "headerFooter";
+
+// Key that specifies the title of the page that will be printed in the headers
+// and footers
+extern const char kSettingHeaderFooterTitle[] = "title";
+
+// Key that specifies the URL of the page that will be printed in the headers
+// and footers
+extern const char kSettingHeaderFooterURL[] = "url";
+
 }  // namespace printing