Enable download_protection_service_unittest.cc on ChromeOS

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 2298 matching lines @@
           ],
         }],
         ['safe_browsing==1', {
           # TODO(sgurun): enable tests for safe_browsing==2.
           'sources': [ '<@(chrome_unit_tests_full_safe_browsing_sources)' ],
           'defines': [ 'FULL_SAFE_BROWSING' ],
           'dependencies': [
             'ipc_protobuf_message_test_proto',
           ],
           'conditions': [
-            ['chromeos == 1', {
-              'sources!': [
-                'browser/safe_browsing/download_protection_service_unittest.cc',
-              ],
-            }],
             ['OS == "android"', {
               'dependencies!': [
                 'ipc_protobuf_message_test_proto',
               ],
               'sources!': [
                 # Android doesn't support download feedbacks.
                 'browser/safe_browsing/download_feedback_service_unittest.cc',
                 'browser/safe_browsing/download_feedback_unittest.cc',
                 'browser/safe_browsing/download_protection_service_unittest.cc',
                 'browser/safe_browsing/two_phase_uploader_unittest.cc',
@@ skipping 457 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }