Add missing tests for context types.
Rearrange some other tests.
Make printing of constant types more useful.
Give counter-examples for properties that no longer hold.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/602613002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24212 ce2b1a6d-e550-0410-aec6-3dcde31c8c00