Disable failing telemetry unit tests on chromeos.

tools/perf/profile_creators/cookie_profile_extender_unittest.py

Index: tools/perf/profile_creators/cookie_profile_extender_unittest.py
diff --git a/tools/perf/profile_creators/cookie_profile_extender_unittest.py b/tools/perf/profile_creators/cookie_profile_extender_unittest.py
index 0dd4d01073452367a34bf3946d93410ebbdb3f7e..f2b0d29ac33ffc21df68124ab84e65beeab97cea 100644
--- a/tools/perf/profile_creators/cookie_profile_extender_unittest.py
+++ b/tools/perf/profile_creators/cookie_profile_extender_unittest.py
@@ -2,10 +2,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os
-import sqlite3
 import tempfile
 import unittest
 
+try:
+  import sqlite3
+except ImportError:
+  sqlite3 = None

[cylee1, 2015/05/04 11:16:59]

How does it different from just "pass" since nobody can reference it anyway

BTW this is a workaround, I'm wondering if the root cause out-dated python
version ?
sqlite3 should be available after python 2.5
https://docs.python.org/2/library/sqlite3.html
If so we should try to make trybot use newer python ?

[achuithb, 2015/05/04 19:48:00]

Done.

This test is running on the device, and sqlite3 is not present. We would have to
update python packages to make this available.

+
+from telemetry import decorators
 from profile_creators.cookie_profile_extender import CookieProfileExtender
 
 
@@ -27,6 +32,7 @@ class CookieProfileExtenderTest(unittest.TestCase):
     connection.commit()
     connection.close()
 
+  @decorators.Disabled('chromeos')  # crbug.com/483212
   def testCookieCount(self):
     # Neither tempfile.TemporaryFile() nor tempfile.NamedTemporaryFile() work
     # well here. The former doesn't work at all, since it doesn't gaurantee a