Created AttestationPolicyObserver.

chrome/browser/chromeos/settings/cros_settings_names.cc

Index: chrome/browser/chromeos/settings/cros_settings_names.cc
diff --git a/chrome/browser/chromeos/settings/cros_settings_names.cc b/chrome/browser/chromeos/settings/cros_settings_names.cc
index 21e2e1d118174f6e379dc1584999eee51e2e7cf4..ccb3ed8722091e5035b26b3692bfd3dc29dcc7ac 100644
--- a/chrome/browser/chromeos/settings/cros_settings_names.cc
+++ b/chrome/browser/chromeos/settings/cros_settings_names.cc
@@ -96,4 +96,8 @@ const char kAllowRedeemChromeOsRegistrationOffers[] =
 // A list pref storing the flags that need to be applied to the browser upon
 // start-up.
 const char kStartUpFlags[] = "cros.startup_flags";
+
+// A boolean pref that indicates whether attestation is enabled for the device.
+const char kDeviceAttestationEnabled[] = "cros.device.attestation_enabled";
+
 }  // namespace chromeos