Roll third_party/inspector_protocol to 715b83a3cfb45ce6c67b6c6fdd2c16391b5db896

This roll includes:
  - [inspector_protocol] always use weak pointer in DispatcherImpl::{command.name} [1]

[1] https://codereview.chromium.org/2545613002/

BUG=chromium:668358
TBR=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2538043003
Cr-Commit-Position: refs/heads/master@{#435535}
2 files changed