Created AttestationPolicyObserver.

WATCHLISTS

Index: WATCHLISTS
diff --git a/WATCHLISTS b/WATCHLISTS
index ce6cbe0eeac47ea2425f9c3abb77f24548934a1f..4d43eb905168f2d49bea02049075cdf827fdb0c6 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -128,6 +128,10 @@
     'chromeos': {
       'filepath': 'chromeos/',
     },
+    'chromeos_attestation': {
+      'filepath': 'chromeos/attestation/|'\
+                  'chrome/browser/chromeos/attestation/',
+    },
     'chromeos_calculator': {
       'filepath': 'chrome/common/extensions/docs/examples/apps/calculator/',
     },
@@ -569,6 +573,7 @@
     'chromedriver': ['kkania@chromium.org'],
     'chromeos' : ['oshima+watch@chromium.org',
                   'stevenjb+watch@chromium.org'],
+    'chromeos_attestation' : ['dkrahn+watch@chromium.org'],
     'chromeos_calculator' : ['dharcourt@chromium.org'],
     'chromeos_net' : ['gauravsh+watch@chromium.org',
                       'gspencer+watch@chromium.org',