Convert printing IPCs to Mojo

components/printing/common/BUILD.gn

Index: components/printing/common/BUILD.gn
diff --git a/components/printing/common/BUILD.gn b/components/printing/common/BUILD.gn
index e3f8e731441c6a9617d885959907cf5147100793..7ca76687239bc89e521a60e5723003a48abfc447 100644
--- a/components/printing/common/BUILD.gn
+++ b/components/printing/common/BUILD.gn
@@ -2,10 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//mojo/public/tools/bindings/mojom.gni")
+
 static_library("common") {
   sources = [
     "print_messages.cc",
     "print_messages.h",
+    "printing_param_traits.cc",
+    "printing_param_traits.h",
     "printing_param_traits_macros.h",
   ]
 
@@ -21,3 +25,13 @@ static_library("common") {
     "//ui/gfx/ipc/skia",
   ]
 }
+
+mojom("interfaces") {
+  sources = [
+    "printing.mojom",
+  ]
+
+  public_deps = [
+    "//mojo/common:common_custom_types",
+  ]
+}