We need to split creating of console and installing memory getter and remove console.assert hack before migration to builtin. We can implement super fast console.assert after migration.

BUG=chromium:588893
R=dgozman@chromium.org
TBR=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2781883003
Cr-Commit-Position: refs/heads/master@{#44256}