Convert printing IPCs to Mojo

printing/pdf_render_settings.h

Index: printing/pdf_render_settings.h
diff --git a/printing/pdf_render_settings.h b/printing/pdf_render_settings.h
index d9e8f9e7801fe134fa689712a33a3eb4f4c9a9aa..9917c2470787d843a2ddadb60aae2ecff476cdcf 100644
--- a/printing/pdf_render_settings.h
+++ b/printing/pdf_render_settings.h
@@ -32,6 +32,13 @@ namespace IPC {
 template <>
 struct ParamTraits<printing::PdfRenderSettings> {
   typedef printing::PdfRenderSettings param_type;
+
+  static void GetSize(base::PickleSizer* s, const param_type& p) {
+    GetParamSize(s, p.area);
+    GetParamSize(s, p.dpi);
+    GetParamSize(s, p.autorotate);
+  }
+
   static void Write(base::Pickle* m, const param_type& p) {
     WriteParam(m, p.area);
     WriteParam(m, p.dpi);