Add a unit test that filenames aren't unintentionally converted to URLs.

ui/ui_unittests.gyp

 # Copyright 2013 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,
   },
   'targets': [
     {
       'target_name': 'ui_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
+        '../net/net.gyp:net',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../url/url.gyp:url_lib',
         'base/ui_base.gyp:ui_base',
         'base/ui_base.gyp:ui_base_test_support',
         'events/events.gyp:events_base',
         'gfx/gfx.gyp:gfx_test_support',
@@ skipping 224 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'ui_unittests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }