Use DPI from Print Preview on Windows, handle non square

printing/print_settings_conversion.cc

Index: printing/print_settings_conversion.cc
diff --git a/printing/print_settings_conversion.cc b/printing/print_settings_conversion.cc
index 19424603808e7032d4b6853e2fac44c2bb8e329d..7e8840cdb948ea5c1aa18a0d555fe890abb8d9c4 100644
--- a/printing/print_settings_conversion.cc
+++ b/printing/print_settings_conversion.cc
@@ -189,6 +189,14 @@ bool PrintSettingsFromJobSettings(const base::DictionaryValue& job_settings,
       !job_settings.GetBoolean(kSettingRasterizePdf, &rasterize_pdf)) {
     return false;
   }
+#if defined(OS_WIN)
+  int dpi_horizontal = 0;
+  int dpi_vertical = 0;
+  if (!job_settings.GetInteger(kSettingDpiHorizontal, &dpi_horizontal) ||
+      !job_settings.GetInteger(kSettingDpiVertical, &dpi_vertical)) {
+    return false;
+  }
+#endif
 
   settings->set_collate(collate);
   settings->set_copies(copies);
@@ -203,6 +211,7 @@ bool PrintSettingsFromJobSettings(const base::DictionaryValue& job_settings,
   bool can_modify = false;
   if (job_settings.GetBoolean(kSettingPreviewModifiable, &can_modify))
     settings->set_print_text_with_gdi(can_modify);
+  settings->set_dpi_xy(dpi_horizontal, dpi_vertical);
 #endif
 
   return true;