Remove implementation of Panels on OSes other than ChromeOS.

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 1267 matching lines @@
       'browser/ui/cocoa/media_picker/desktop_media_picker_controller_unittest.mm',
       'browser/ui/cocoa/menu_button_unittest.mm',
       'browser/ui/cocoa/notifications/notification_builder_mac_unittest.mm',
       'browser/ui/cocoa/notifications/notification_response_builder_mac_unittest.mm',
       'browser/ui/cocoa/nsmenuitem_additions_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_cell_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_matrix_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_separator_view_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_popup_view_mac_unittest.mm',
       'browser/ui/cocoa/omnibox/omnibox_view_mac_unittest.mm',
-      'browser/ui/cocoa/panels/panel_cocoa_unittest.mm',
       'browser/ui/cocoa/passwords/account_chooser_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/autosignin_prompt_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/base_passwords_controller_test.h',
       'browser/ui/cocoa/passwords/base_passwords_controller_test.mm',
       'browser/ui/cocoa/passwords/confirmation_password_saved_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/manage_passwords_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/passwords_bubble_cocoa_unittest.mm',
       'browser/ui/cocoa/passwords/passwords_bubble_controller_unittest.mm',
       'browser/ui/cocoa/passwords/passwords_list_view_controller_unittest.mm',
       'browser/ui/cocoa/passwords/save_pending_password_view_controller_unittest.mm',
@@ skipping 223 matching lines @@
       'browser/ui/browser_instant_controller_unittest.cc',
       'browser/ui/browser_unittest.cc',
       'browser/ui/chrome_bubble_manager_unittest.cc',
       'browser/ui/content_settings/content_setting_bubble_model_unittest.cc',
       'browser/ui/content_settings/content_setting_image_model_unittest.cc',
       'browser/ui/exclusive_access/fullscreen_controller_state_unittest.cc',
       'browser/ui/extensions/extension_action_view_controller_unittest.cc',
       'browser/ui/global_error/global_error_service_unittest.cc',
       'browser/ui/omnibox/clipboard_utils_unittest.cc',
       'browser/ui/omnibox/omnibox_controller_unittest.cc',
-      'browser/ui/panels/panel_mouse_watcher_unittest.cc',
       'browser/ui/passwords/manage_passwords_bubble_model_unittest.cc',
       'browser/ui/passwords/manage_passwords_view_utils_desktop_unittest.cc',
       'browser/ui/passwords/password_dialog_controller_impl_unittest.cc',
       'browser/ui/search/instant_search_prerenderer_unittest.cc',
       'browser/ui/search/instant_tab_unittest.cc',
       'browser/ui/search/search_delegate_unittest.cc',
       'browser/ui/search/search_ipc_router_policy_unittest.cc',
       'browser/ui/search/search_ipc_router_unittest.cc',
       'browser/ui/search/search_model_unittest.cc',
       'browser/ui/search/search_tab_helper_unittest.cc',
@@ skipping 1469 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }