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

chrome/common/common_message_generator.cc

Index: chrome/common/common_message_generator.cc
diff --git a/chrome/common/common_message_generator.cc b/chrome/common/common_message_generator.cc
index eb1dda28ece5c4ce535e35889761b224d0fae4a6..1eeb253e2dd9fdd080039a560aa4566f78a894ab 100644
--- a/chrome/common/common_message_generator.cc
+++ b/chrome/common/common_message_generator.cc
@@ -16,6 +16,13 @@
 #include "chrome/common/safe_browsing/ipc_protobuf_message_null_macros.h"
 #include "chrome/common/common_message_generator.h"
 
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+#include "chrome/common/safe_browsing/protobuf_message_size_macros.h"
+namespace IPC {
+#include "chrome/common/common_message_generator.h"
+}  // namespace IPC
+
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 #include "chrome/common/safe_browsing/protobuf_message_write_macros.h"