Without this CL we have only limit for amount of console messages and if user are dumping a huge messages we pretty soon run out of memory.
So let's introduce limit for memory consumption it would help chromium and Node.js as well.

BUG=chromium:671489
R=dgozman@chomium.org,alph@chromium.org, hpayer@chromium.org, ulan@chromium.org

Review-Url: https://codereview.chromium.org/2653293003
Cr-Commit-Position: refs/heads/master@{#42780}