Moved the policy functional tests to their own suite on ChromeOS.

chrome/test/functional/PYAUTO_TESTS

Index: chrome/test/functional/PYAUTO_TESTS
diff --git a/chrome/test/functional/PYAUTO_TESTS b/chrome/test/functional/PYAUTO_TESTS
index bb62ccf51e7abd85e650a13eb4146d3149167fd9..6e27611cc25129aba42b4fb1833cd37b02fcda71 100644
--- a/chrome/test/functional/PYAUTO_TESTS
+++ b/chrome/test/functional/PYAUTO_TESTS
@@ -281,6 +281,10 @@
       '-imports',
       # Multi-profile doesn't apply to chromeos yet.
       '-multiprofile',
+      # These require a custom setup on ChromeOS and have their own suite for
+      # this platform.
+      '-policy',
+      '-policy_prefs_ui',
 
       # ==================================================
       # Disabled tests that need to be investigated/fixed.
@@ -575,6 +579,15 @@
     ],
   },
 
+  # ChromeOS policy tests. These are shared with Desktop Chrome tests, but
+  # require custom setup on ChromeOS.
+  'CHROMEOS_POLICY': {
+    'chromeos': [
+      'policy',
+      'policy_prefs_ui',
+    ],
+  },
+
   # ChromeOS volume tests.
   'CHROMEOS_VOLUME': {
     'chromeos': [