Strange warning on build for Linux

[aizikovich4]

I am try to build qtwebdriver under Ubuntu 16.04 (with gcc 5.3.1 ) and get next strange warnings:

/qtwebdriver/Chromium_Base/../inc/base/move.h:198:31: note: in definition of macro ‘MOVE_ONLY_TYPE_FOR_CPP_03’
   struct rvalue_type : public type { \
                               ^
/home/qtwebdriver/Chromium_Base/../inc/base/memory/scoped_ptr.h:133:7: note: definition of ‘class scoped_ptr<C>’ is not complete until the closing brace
 class scoped_ptr {
       ^

But in Windows it buildings without any problem (MSVS 2017)
Can anybody explain - is it normal behavior or not? And exist any way to fix it warning?