[rac] Add STL utilities from Chrome to libaddressinput.

This patch adds STL utilities from Chrome to libaddressinput. The
utilities will be used to delete heap-allocated objects inside STL
containers.

http://src.chromium.org/viewvc/chrome/trunk/src/base/stl_util.h?revision=221067
http://src.chromium.org/viewvc/chrome/trunk/src/base/stl_util_unittest.cc?revision=171321

BUG=327046

Review URL: https://codereview.chromium.org/116253003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241420 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241420