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

extensions/common/permissions/settings_override_permission.h

Index: extensions/common/permissions/settings_override_permission.h
diff --git a/extensions/common/permissions/settings_override_permission.h b/extensions/common/permissions/settings_override_permission.h
index e5bb9a028f5b6b9595ca09e994446636571c2c98..66e92d66750025b22bf6cc693886e5961abcf7e7 100644
--- a/extensions/common/permissions/settings_override_permission.h
+++ b/extensions/common/permissions/settings_override_permission.h
@@ -33,6 +33,7 @@ class SettingsOverrideAPIPermission : public APIPermission {
   APIPermission* Diff(const APIPermission* rhs) const override;
   APIPermission* Union(const APIPermission* rhs) const override;
   APIPermission* Intersect(const APIPermission* rhs) const override;
+  void GetSize(base::PickleSizer* s) const override;
   void Write(base::Pickle* m) const override;
   bool Read(const base::Pickle* m, base::PickleIterator* iter) override;
   void Log(std::string* log) const override;