New build flag system, convert Google Now flag

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': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1638 matching lines @@
       #
       # GN version: //chrome/test:test_support but that is split apart into
       # separate test_support targets for that various subdirectories under
       # chrome.
       'target_name': 'test_support_common',
       'type': 'static_library',
       'dependencies': [
         # NOTE: New dependencies should generally be added in the OS!="ios"
         # dependencies block below, rather than here.
         'browser',
+        'chrome_common_features',
         'chrome_resources.gyp:chrome_resources',
         'chrome_resources.gyp:chrome_strings',
         'chrome_resources.gyp:theme_resources',
         'common',
         '../base/base.gyp:base_prefs_test_support',
         '../base/base.gyp:test_support_base',
         '../components/components.gyp:bookmarks_test_support',
         '../components/components.gyp:gcm_driver_test_support',
         '../components/components.gyp:history_core_test_support',
         '../components/components.gyp:instance_id_test_support',
@@ skipping 534 matching lines @@
         '../courgette/courgette.gyp:courgette_lib',
         '../google_apis/google_apis.gyp:google_apis',
         '../skia/skia.gyp:skia',
         '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../third_party/libxml/libxml.gyp:libxml',
         '../ui/base/ui_base.gyp:ui_base_test_support',
         '../ui/gfx/gfx.gyp:gfx_test_support',
         '../ui/resources/ui_resources.gyp:ui_resources',
+        'chrome_common_features',
         'chrome_resources.gyp:chrome_resources',
         'chrome_resources.gyp:chrome_strings',
       ],
       'include_dirs': [
         '..',
       ],
       'msvs_settings': {
         'VCLinkerTool': {
           'conditions': [
             ['incremental_chrome_dll==1', {
@@ skipping 766 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }