Opt an initial batch of files under samples, samples-dev,
utils, and runtime/tools/dartfuzz out of null safety in preparation
for switching the flag on by default.
Change-Id: Icdfd52a5a969e678a7205903332f73fe3841c223
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/166960
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Leaf Petersen <leafp@google.com>
Readd samples, samples-dev, tools/testing/bin, third_party removed by cleanup (no history, sorry)
Add DEPS file which will replace the old all.deps and standalone.deps
Add tools/deps/dartium.deps replacing the old dartium.deps (but now editable from a normal checkout)
Fixup tools/utils.py to use the new archiving schema (git count for be, version number for dev/stable
Fix codereview.settings
