Fix crash bugs of FramePainter.
Sometimes FramePainter is deleted without its window's OnWindowDestroying, so removing the kSoloWindowFramePainterKey property explicitly at the destructor.
Also this CL adds the checks of painter's frame_ and its non_client_view() since they may be NULL on window destroying timing on test.
BUG=155634
TEST=ash_unittests passed with the new test
Review URL: https://chromiumcodereview.appspot.com/11194015
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162432 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed
