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

extensions/common/permissions/set_disjunction_permission.h

Index: extensions/common/permissions/set_disjunction_permission.h
diff --git a/extensions/common/permissions/set_disjunction_permission.h b/extensions/common/permissions/set_disjunction_permission.h
index d787d629ce919ae9064f6957dde7c526489193a6..fedcf2c8aeab53bfc04fb7e54a19b453061a6526 100644
--- a/extensions/common/permissions/set_disjunction_permission.h
+++ b/extensions/common/permissions/set_disjunction_permission.h
@@ -152,6 +152,10 @@ class SetDisjunctionPermission : public APIPermission {
     return std::unique_ptr<base::Value>(list);
   }
 
+  void GetSize(base::PickleSizer* s) const override {
+    IPC::GetParamSize(s, data_set_);
+  }
+
   void Write(base::Pickle* m) const override { IPC::WriteParam(m, data_set_); }
 
   bool Read(const base::Pickle* m, base::PickleIterator* iter) override {