Bring inspector_protocol.gypi back

This file is used by V8's gyp. It will be moved out from platform/ soon.

R=brettw@chromium.org,dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2333863002
Cr-Original-Commit-Position: refs/heads/master@{#418699}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 8430bd332b7f8c625a1ea971dcb9b6b79c0fbc38
1 file changed