Add browser_tests to the GN build.

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 1857 matching lines @@
           'sources': [
             'browser/local_discovery/test_service_discovery_client.cc',
             'browser/local_discovery/test_service_discovery_client.h',
           ],
         }],
         ['enable_app_list==1', {
           'sources': [
             'browser/ui/app_list/test/chrome_app_list_test_support.cc',
             'browser/ui/app_list/test/chrome_app_list_test_support.h',
             'browser/ui/app_list/test/test_app_list_controller_delegate.cc',
-            'browser/ui/app_list/test/test_app_list_controller_delegate.cc',
+            'browser/ui/app_list/test/test_app_list_controller_delegate.h',
           ],
         }],
         ['enable_webrtc==1', {
           'sources': [
             'renderer/media/mock_webrtc_logging_message_filter.cc',
             'renderer/media/mock_webrtc_logging_message_filter.h',
           ],
         }],
         ['enable_wifi_bootstrapping', {
           "sources" : [
@@ skipping 1066 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }