• Fix build on HEAD

In file included from ../../services/ui/ws/window_manager_state.cc:5:
In file included from ../../services/ui/ws/window_manager_state.h:10:
In file included from /usr/include/c++/v1/memory:599:
/usr/include/c++/v1/__config:58:2: error: "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. use _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR instead
#error "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. \
^
1 error generated.

PR: 214654
Submitted by: dim
Reported by: jbeich
Reviewed by: rene
Approved by: chromium (rene)
MFH: 2017Q1