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

components/guest_view/common/guest_view_message_generator.cc

Index: components/guest_view/common/guest_view_message_generator.cc
diff --git a/components/guest_view/common/guest_view_message_generator.cc b/components/guest_view/common/guest_view_message_generator.cc
index 6a0bca159e1ae477e6c4f61c8f6effcb7e03acb5..a55a976a344f63adb8e11d76924e5e91ccab34e9 100644
--- a/components/guest_view/common/guest_view_message_generator.cc
+++ b/components/guest_view/common/guest_view_message_generator.cc
@@ -14,6 +14,12 @@
 #include "ipc/struct_destructor_macros.h"
 #include "components/guest_view/common/guest_view_message_generator.h"
 
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+namespace IPC {
+#include "components/guest_view/common/guest_view_message_generator.h"
+}  // namespace IPC
+
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 namespace IPC {