Move settings setup for PDF and cloud print into single location in PrintingContext

printing/print_settings.cc

Index: printing/print_settings.cc
diff --git a/printing/print_settings.cc b/printing/print_settings.cc
index 9e2a2517e16d524cfa4d6d447db89ac54f4f888e..f2dc42585dafc8b0ee7fa1c55d5c7273e97aef1d 100644
--- a/printing/print_settings.cc
+++ b/printing/print_settings.cc
@@ -140,10 +140,10 @@ void PrintSettings::Clear() {
 }
 
 void PrintSettings::SetPrinterPrintableArea(
-    gfx::Size const& physical_size_device_units,
-    gfx::Rect const& printable_area_device_units,
-    int units_per_inch,
+    const gfx::Size& physical_size_device_units,
+    const gfx::Rect& printable_area_device_units,
     bool landscape_needs_flip) {
+  int units_per_inch = device_units_per_inch();
   int header_footer_text_height = 0;
   if (display_header_footer_) {
     // Hard-code text_height = 0.5cm = ~1/5 of inch.