Revert 228654 "Factor out [min|max]_size into ShellWindow::SizeC..."

> Factor out [min|max]_size into ShellWindow::SizeConstraints
> 
> This encapsulates the logic for managing window size constraints.
> 
> BUG=305477
> 
> Review URL: https://codereview.chromium.org/26751003

TBR=jackhou@chromium.org

Review URL: https://codereview.chromium.org/27311003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228656 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228656