Support different Google attestation (Privacy CA) servers.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 564105ced27fe9278eb4c463c4fcfe03c6a92806..d392adbb66dfa9aec1592bb9b0f68d0b7cf47fc1 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -412,6 +412,9 @@ const char kSystemDevMode[] = "system-developer-mode";
 // Enables testing for auto update UI.
 const char kTestAutoUpdateUI[] = "test-auto-update-ui";
 
+// Determines which Google Privacy CA to use for attestation.
+const char kAttestationServer[] = "attestation-server";
+
 // Enables wake on wifi packet feature, which wakes the device on the receipt
 // of network packets from whitelisted sources.
 const char kWakeOnWifiPacket[] = "wake-on-wifi-packet";