Created fakes for HID-detection screen testing. Initial browsertest added.

chrome/chrome_tests.gypi

 # 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': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 638 matching lines @@
       'browser/chromeos/input_method/mode_indicator_browsertest.cc',
       'browser/chromeos/login/crash_restore_browsertest.cc',
       'browser/chromeos/login/demo_mode/demo_app_launcher_browsertest.cc',
       'browser/chromeos/login/enable_debugging_browsertest.cc',
       'browser/chromeos/login/enrollment/enrollment_screen_browsertest.cc',
       'browser/chromeos/login/enrollment/mock_auto_enrollment_check_screen.cc',
       'browser/chromeos/login/enrollment/mock_auto_enrollment_check_screen.h',
       'browser/chromeos/login/enrollment/mock_enrollment_screen.cc',
       'browser/chromeos/login/enrollment/mock_enrollment_screen.h',
       'browser/chromeos/login/existing_user_controller_browsertest.cc',
+      'browser/chromeos/login/hid_detection_browsertest.cc',
       'browser/chromeos/login/kiosk_browsertest.cc',
       'browser/chromeos/login/lock/screen_locker_tester.cc',
       'browser/chromeos/login/lock/screen_locker_tester.h',
       'browser/chromeos/login/login_manager_test.cc',
       'browser/chromeos/login/login_manager_test.h',
       'browser/chromeos/login/login_screen_policy_browsertest.cc',
       'browser/chromeos/login/login_ui_keyboard_browsertest.cc',
       'browser/chromeos/login/login_utils_browsertest.cc',
       'browser/chromeos/login/mixin_based_browser_test.cc',
       'browser/chromeos/login/mixin_based_browser_test.h',
@@ skipping 2487 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }