linux: port some of the download manager unit test

chrome/chrome.gyp

 # Copyright (c) 2009 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': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 4329 matching lines @@
         ['OS=="linux"', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
             '../build/linux/system.gyp:nss',
             '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
           ],
           'sources': [
             'browser/renderer_host/gtk_key_bindings_handler_unittest.cc',
           ],
           'sources!': [
-            # This test is mostly about renaming downloads to safe file
-            # names. As such we don't need/want to port it to linux. We
-            # might want to write our own tests for the download manager
-            # on linux, though.
-            'browser/download/download_manager_unittest.cc',
             'browser/views/bookmark_context_menu_test.cc',
             'browser/gtk/options/cookies_view_unittest.cc',
             # Compact Language Detection (cld) is not supported in linux yet.
             '../third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_unittest_small.cc',
           ],
         }],
         ['OS=="linux" and (toolkit_views==1 or chromeos==1)', {
           'dependencies': [
             '../views/views.gyp:views',
           ],
@@ skipping 2291 matching lines @@
               'defines': [
                 'POSIX',
               ],
             }],
           ],
         },
       ],  # targets when chrome_personalization==1 and use_syncapi_stub==0
     }],
   ],  # 'conditions'
 }