Roll inspector_protocol to 9cba74155ff34f0695c1f975ee087049204d3dc5.

Add additional files:
BUILD.gn
encoding/*

This will make it easier to experiment with linking the encoding
library into browser (and perhaps blink too).

To make it possible to build / run the encoding tests,
adding a DEPS file with a regex to allow these tests to
depend on base, gtest, gmock.

Change-Id: Id142c7ccf4b5e4ec8a56ef282793d080d239fc6f
Reviewed-on: https://chromium-review.googlesource.com/c/1422998
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624330}
21 files changed