Disable media_cns_cases on ANDROID, make it DESKTOP only test.

masters/master.chromium.perf/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the buildmaster config file for the 'chromium' bot. It must
 # be installed as 'master.cfg' in your buildmaster's base directory
 # (although the filename can be changed with the --basedir option to
@@ skipping 66 matching lines @@
 # TODO: It would be really nice if buildbot could calculate these runtimes.
 
 # These are benchmarks that run everywhere.
 _CROSS_PLATFORM_BENCHMARKS = [
     (23, 'blink_perf'),
     ( 3, 'dom_perf'),
     (28, 'dromaeo'),
     ( 1, 'indexeddb_perf'),
     ( 3, 'kraken'),
     ( 1, 'media_mse_cases'),
-    (15, 'media_media_cns_cases'),
     ( 3, 'octane'),
     ( 8, 'page_cycler_bloat'),
     ( 2, 'page_cycler_dhtml'),
     ( 2, 'page_cycler_indexeddb'),
     ( 5, 'page_cycler_intl_ar_fa_he'),
     (14, 'page_cycler_intl_es_fr_pt-BR'),
     (13, 'page_cycler_intl_hi_ru'),
     (18, 'page_cycler_intl_ja_zh'),
     (12, 'page_cycler_intl_ko_th_vi'),
     ( 8, 'page_cycler_morejs'),
@@ skipping 18 matching lines @@
     ( 1, 'robohornet_pro'),
     ( 7, 'smoothness_top_25'),
     ( 7, 'smoothness_tough_canvas_cases'),
     (13, 'spaceport'),
 ]
 
 # These run only on Desktop because of various technical limitations.
 # We'd like to run them on Android when possible.
 _DESKTOP_ONLY_BENCHMARKS = [
     ( 1, 'idb_perf'),
+    (15, 'media_media_cns_cases'),
     (15, 'media_tough_media_cases'),
     ( 5, 'memory'),
     ( 4, 'shutdown'),
     ( 2, 'startup_cold'),
     ( 7, 'startup_cold_dirty'),
     ( 7, 'startup_cold_session_restore'),
     ( 2, 'startup_warm'),
     ( 2, 'startup_warm_dirty'),
     ( 4, 'startup_warm_session_restore'),
     ( 1, 'sync'),
@@ skipping 1053 matching lines @@
 
 ####### PROJECT IDENTITY
 
 # the 'projectName' string will be used to describe the project that this
 # buildbot is working on. For example, it is used as the title of the
 # waterfall HTML page. The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 
 c['projectName'] = ActiveMaster.project_name
 c['projectURL'] = config.Master.project_url