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

chrome/common/common_param_traits.cc

Index: chrome/common/common_param_traits.cc
diff --git a/chrome/common/common_param_traits.cc b/chrome/common/common_param_traits.cc
index 466cfde6da84d0c6c4b4e7ab3e6af9f81e8e1542..5a73c52f5256b5cecd360cc70973c06ec1e71cb2 100644
--- a/chrome/common/common_param_traits.cc
+++ b/chrome/common/common_param_traits.cc
@@ -5,6 +5,13 @@
 // Get basic type definitions.
 #include "chrome/common/common_param_traits.h"
 
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+namespace IPC {
+#undef CHROME_COMMON_COMMON_PARAM_TRAITS_MACROS_H_
+#include "chrome/common/common_param_traits_macros.h"
+}
+
 // Generate param traits write methods.
 #include "ipc/param_traits_write_macros.h"
 namespace IPC {