[AppList] Add a Suggestions Provider to applist.

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': [
       '../apps/saved_files_service_unittest.cc',
       '../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',
@@ skipping 2103 matching lines @@
           'dependencies': [
             'common/extensions/api/api.gyp:chrome_api',
             '../extensions/extensions_resources.gyp:extensions_resources',
             '../extensions/extensions_strings.gyp:extensions_strings',
           ],
         }],
         ['use_ash==1', {
           'sources': [
             'browser/ui/app_list/search/app_search_provider_unittest.cc',
             'browser/ui/app_list/search/history_unittest.cc',
+            'browser/ui/app_list/search/suggestions/suggestions_search_provider_unittest.cc',
           ],
           'dependencies': [
             '../ash/ash.gyp:ash_test_support',
             '../ash/ash_resources.gyp:ash_resources',
             '../ash/ash_strings.gyp:ash_strings',
           ],
           # We eventually want to compile both in Win Aura builds, see
           # http://crbug.com/155545.
           'conditions': [
             ['OS !="win"', {
@@ skipping 808 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }