1 List of property sheets to be included by projects:
3 Not used anymore. No-op. Kept for compatibility with current projects.
6 Enables debug settings. Must be included directly in Debug configuration. Includes internal\essential.vsprops.
9 Contains settings made to simplify usage of external (non-Google) code. It relaxes the warning levels. Should be included after debug.vsprops or release.vsprops to override their settings.
12 Run to enable automatic copy of DLL when they are as an input file in a vcproj project.
15 Enables release settings. Must be included directly in Release configuration. Includes internal\essential.vsprops. Also includes "internal\release_impl$(CHROME_BUILD_TYPE).vsprops". So the behavior is dependant on the CHROME_BUILD_TYPE environment variable.