Remove remainder of Athena related code from Chrome

chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 2191 matching lines @@
           # We eventually want to compile both in Win Aura builds, see
           # http://crbug.com/155545.
           'conditions': [
             ['OS !="win"', {
               'sources!': [
                 'browser/ui/window_sizer/window_sizer_unittest.cc',
               ],
             }],
           ],
         }],
-        ['use_athena==1', {
-          'sources!': [
-            'browser/chromeos/login/users/wallpaper/wallpaper_manager_unittest.cc',
-            'browser/chromeos/extensions/wallpaper_private_api_unittest.cc',
-          ],
-        }],
         ['use_aura==1', {
           'dependencies': [
             '../ui/wm/wm.gyp:wm',
             '../ui/aura/aura.gyp:aura_test_support',
             '../ui/views/views.gyp:views_test_support',
           ],
           'sources!': [
             'browser/ui/views/extensions/browser_action_drag_data_unittest.cc',
           ],
           'sources': [
@@ skipping 525 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }