[DevTools] Introduce config file for inspector_protocol.

Drive-by: fixing small issues in generator.

BUG=637032

Review-Url: https://codereview.chromium.org/2240663003
Cr-Original-Commit-Position: refs/heads/master@{#411898}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 299805a3efd15f7464d2a768051b9f107adc09a4
2 files changed