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

chrome/common/safe_browsing/protobuf_message_param_traits.h

Index: chrome/common/safe_browsing/protobuf_message_param_traits.h
diff --git a/chrome/common/safe_browsing/protobuf_message_param_traits.h b/chrome/common/safe_browsing/protobuf_message_param_traits.h
index a935584d0d85edba03c0ba5edc01c6886a282db8..76613ce30d22f2660ec729b89ec9a4cc57e76814 100644
--- a/chrome/common/safe_browsing/protobuf_message_param_traits.h
+++ b/chrome/common/safe_browsing/protobuf_message_param_traits.h
@@ -20,6 +20,12 @@ template <class Element>
 struct ParamTraits<google::protobuf::RepeatedPtrField<Element>> {
   typedef google::protobuf::RepeatedPtrField<Element> param_type;
 
+  static void GetSize(base::PickleSizer* s, const param_type& p) {
+    GetParamSize(s, p.size());
+    for (const auto& element : p)
+      GetParamSize(s, element);
+  }
+
   static void Write(base::Pickle* m, const param_type& p) {
     WriteParam(m, p.size());
     for (const auto& element : p)