We don't call any of v8::Debug methods in src/inspector codebase and should use debug-interface.h instead.

BUG=none
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2710243002
Cr-Original-Commit-Position: refs/heads/master@{#43398}
Committed: https://chromium.googlesource.com/v8/v8/+/838b1a8841aba0c421b413c01b0fbd3c024c2249
Review-Url: https://codereview.chromium.org/2710243002
Cr-Commit-Position: refs/heads/master@{#43420}