Added Header and Footer support using Skia

printing/units.cc

Index: printing/units.cc
diff --git a/printing/units.cc b/printing/units.cc
index 976fa802c97e0f1a69c261be4e238214f6b7d104..84d78bba061df4c90b0872c1e0a0f70c72970c5b 100644
--- a/printing/units.cc
+++ b/printing/units.cc
@@ -5,6 +5,7 @@
 #include "printing/units.h"
 
 #include "base/logging.h"
+#include "printing/print_job_constants.h"
 
 namespace printing {
 
@@ -47,4 +48,18 @@ double ConvertPixelsToPointDouble(double pixels) {
   return ConvertUnitDouble(pixels, kPixelsPerInch, kPointsPerInch);
 }
 
+double ConvertPointsToPixelDouble(double points) {
+  return ConvertUnitDouble(points, kPointsPerInch, kPixelsPerInch);
+}
+
+double GetHeaderFooterSegmentWidth(double page_width) {
+  // Interstice is left at both ends of the page as well as between
+  // each region, so 1 is added.
+  double total_interstice_width =
+      (printing::kSettingHeaderFooterHorizontalRegions + 1) *
+      printing::kSettingHeaderFooterInterstice;
+  return (page_width - total_interstice_width) /
+             printing::kSettingHeaderFooterHorizontalRegions;
+}
+
 }  // namespace printing