[chromeos] pyauto tests should auto login by default on chromeos

chrome/test/functional/chromeos_accessibility.py

Index: chrome/test/functional/chromeos_accessibility.py
diff --git a/chrome/test/functional/chromeos_accessibility.py b/chrome/test/functional/chromeos_accessibility.py
index ce5d7528b11ec4ea85abbc676c6c48a2bafe339a..0dec404d1a22441d101ebf6c12b812b05bb687b7 100755
--- a/chrome/test/functional/chromeos_accessibility.py
+++ b/chrome/test/functional/chromeos_accessibility.py
@@ -24,6 +24,9 @@ class AccessibilityTest(pyauto.PyUITest):
   """
   find_test_data_dir = 'find_in_page'
 
+  def ShouldAutoLogin(self):
+    return False
+
   def setUp(self):
     # We want a clean session_manager instance for every run,
     # so restart ui now.