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

gpu/ipc/common/gpu_message_generator.cc

Index: gpu/ipc/common/gpu_message_generator.cc
diff --git a/gpu/ipc/common/gpu_message_generator.cc b/gpu/ipc/common/gpu_message_generator.cc
index ab8f489094852eb425209f331a0e542e21700d80..46a9d7fbf5bf9627dc549f72ab880dda41dc0bff 100644
--- a/gpu/ipc/common/gpu_message_generator.cc
+++ b/gpu/ipc/common/gpu_message_generator.cc
@@ -14,6 +14,12 @@
 #include "ipc/struct_destructor_macros.h"
 #include "gpu/ipc/common/gpu_message_generator.h"
 
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+namespace IPC {
+#include "gpu/ipc/common/gpu_message_generator.h"
+}
+
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 namespace IPC {