Initial implementation of FeatureList in base/.
This first CL adds the initial version of FeatureList singleton class,
providing support for the following:
- Initial class structure and singleton registration
- Support for --enable-features= and --disable-features= flags
- API to test if a feature is enabled or not
- Its registration in chrome_browser_main.cc
- Debug checks to ensure each Feature struct is defined only once
- Basic unit tests
Parts that will be implemented in follow-up CLs:
- Integration with FieldTrials (split out into a follow-up CL)
- VariationsService integration and kill switch support
- Various bits above base/ (e.g. about flags, sub-process stuff ,..)
BUG=526169
Review URL: https://codereview.chromium.org/1278403003
Cr-Commit-Position: refs/heads/master@{#347438}
CrOS-Libchrome-Original-Commit: bccbb867acc61bb9b8c88e3a7b0cbee6b08df0de
5 files changed