Move non-browser specific ScreenshotTaker code to ui/snapshot.

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 879 matching lines @@
       'browser/ui/app_list/test/fake_profile_store.cc',
       'browser/ui/app_list/test/fake_profile_store.h',
       'browser/ui/app_list/test/fast_show_pickler_unittest.cc',
       'browser/ui/ash/ime_controller_chromeos_unittest.cc',
       'browser/ui/ash/accessibility/ax_tree_source_ash_unittest.cc',
       'browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc',
       'browser/ui/ash/launcher/launcher_context_menu_unittest.cc',
       'browser/ui/ash/multi_user/multi_user_context_menu_chromeos_unittest.cc',
       'browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc',
       'browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc',
-      'browser/ui/ash/screenshot_taker_unittest.cc',
       'browser/ui/ash/session_state_delegate_chromeos_unittest.cc',
       'browser/ui/ash/window_positioner_unittest.cc',
       'browser/ui/autofill/account_chooser_model_unittest.cc',
       'browser/ui/autofill/autofill_dialog_controller_unittest.cc',
       'browser/ui/autofill/autofill_dialog_i18n_input_unittest.cc',
       'browser/ui/autofill/autofill_dialog_models_unittest.cc',
       'browser/ui/autofill/autofill_dialog_types_unittest.cc',
       'browser/ui/autofill/autofill_popup_controller_unittest.cc',
       'browser/ui/autofill/country_combobox_model_unittest.cc',
       'browser/ui/autofill/data_model_wrapper_unittest.cc',
@@ skipping 2009 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }