Generate param traits size methods for IPC files in chrome/ (and traits it depends on).

components/printing/common/print_messages.cc

Index: components/printing/common/print_messages.cc
diff --git a/components/printing/common/print_messages.cc b/components/printing/common/print_messages.cc
index e1a107a656f514de32b96c5bc7def13137db11c9..6798e35da6eaf01c16abb5b7ee9b8be56bdffa45 100644
--- a/components/printing/common/print_messages.cc
+++ b/components/printing/common/print_messages.cc
@@ -16,6 +16,12 @@
 #include "ipc/struct_destructor_macros.h"
 #include "components/printing/common/print_messages.h"
 
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+namespace IPC {
+#include "components/printing/common/print_messages.h"
+}
+
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 namespace IPC {