[DevTools] Move Console to v8_inspector

This is a first patch in the effort of moving console to v8_inspector:
- move Console object;
- move ConsoleMessage;
- move ConsoleMessageStorage.

The benefits are:
- moves the last v8-related inspector aspect to v8_inspector;
- simplifies bindings between console, profiler and timeline;
- reduces console API for the embedder, which mostly uses it as a log storage.

As a side effect, this patch makes Console object functions automatically bound to Console:
var log = console.log; log(42);

BUG=167911,580337
R=dgozman@chromium.org,jochen@chromium.org

Review URL: https://codereview.chromium.org/1859293002

Cr-Commit-Position: refs/heads/master@{#388788}
91 files changed