DevTools: generate string16-based handlers for v8_inspector.

BUG=580337

Review URL: https://codereview.chromium.org/1767883002

Cr-Original-Commit-Position: refs/heads/master@{#379933}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 06595f0c4376466cfdd21d2c7f6fc91d9c1142a6
22 files changed