What will we get:
- console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
- it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
- console calls are ~ 15% faster.

BUG=v8:6175
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2785293002
Cr-Commit-Position: refs/heads/master@{#44353}