ozone: Allow ozone evdev/kvm features to be enabled without running on ChromeOS.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 4a6bdfa83a9b5e0c4b8e1a5cfacb13a082c95787..68023d820d493d14875ebef34f1ccf1e9f0c71fb 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -418,6 +418,9 @@ const char kAttestationServer[] = "attestation-server";
 // of network packets from whitelisted sources.
 const char kWakeOnWifiPacket[] = "wake-on-wifi-packet";
 
+// Force system compositor mode when set.
+const char kForceSystemCompositorMode[] = "force-system-compositor-mode";
+
 bool WakeOnWifiEnabled() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(kDisableWakeOnWifi);
 }