Convert printing IPCs to Mojo

printing/BUILD.gn

Index: printing/BUILD.gn
diff --git a/printing/BUILD.gn b/printing/BUILD.gn
index b3ffe9529b2ef62f362efb02d5c9c3c6280a29b7..fa5a96fbd8e34128945f70961f652f1d67709753 100644
--- a/printing/BUILD.gn
+++ b/printing/BUILD.gn
@@ -46,6 +46,7 @@ component("printing") {
     "pdf_metafile_cg_mac.h",
     "pdf_metafile_skia.cc",
     "pdf_metafile_skia.h",
+    "pdf_render_settings.h",
     "print_dialog_gtk_interface.h",
     "print_job_constants.cc",
     "print_job_constants.h",
@@ -68,6 +69,7 @@ component("printing") {
     "printing_context.h",
     "printing_utils.cc",
     "printing_utils.h",
+    "pwg_raster_settings.h",
     "units.cc",
     "units.h",
   ]
@@ -82,10 +84,13 @@ component("printing") {
     "//base",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
+    "//ipc",
     "//skia",
     "//third_party/icu",
     "//ui/gfx",
     "//ui/gfx/geometry",
+    "//ui/gfx/ipc",
+    "//ui/gfx/ipc/skia",
     "//url",
   ]