Make our Windows build settings actually take effect
Make our Windows build settings actually take effect

We need to put them inside the target_defaults dictionary. Now that these
settings are turned on, we need to ignore some warnings that Chromium ignores.

bbondy/brightray,lakshmi-srinivas/brightray,deepak1556/brightray,tejaspathak/brightray,brave/brightray,deepak1556/brightray,hokein/brightray,tejaspathak/brightray,lakshmi-srinivas/brightray,paulcbetts/brightray,hokein/brightray,atom/brightray,lakshmi-srinivas/brightray,paulcbetts/brightray,brave/brightray,bbondy/brightray,atom/brightray