Add unit tests for DesktopMediaPickerViews.

chrome/chrome_browser_ui.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_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 1935 matching lines @@
       'browser/ui/views/content_setting_bubble_contents.h',
       'browser/ui/views/cookie_info_view.cc',
       'browser/ui/views/cookie_info_view.h',
       'browser/ui/views/create_application_shortcut_view.cc',
       'browser/ui/views/create_application_shortcut_view.h',
       'browser/ui/views/critical_notification_bubble_view.cc',
       'browser/ui/views/critical_notification_bubble_view.h',
       'browser/ui/views/crypto_module_password_dialog_view.cc',
       'browser/ui/views/crypto_module_password_dialog_view.h',
       'browser/ui/views/desktop_media_picker_views.cc',
+      'browser/ui/views/desktop_media_picker_views.h',
       'browser/ui/views/detachable_toolbar_view.cc',
       'browser/ui/views/detachable_toolbar_view.h',
       'browser/ui/views/download/download_danger_prompt_views.cc',
       'browser/ui/views/download/download_feedback_dialog_view.cc',
       'browser/ui/views/download/download_feedback_dialog_view.h',
       'browser/ui/views/download/download_in_progress_dialog_view.cc',
       'browser/ui/views/download/download_in_progress_dialog_view.h',
       'browser/ui/views/download/download_item_view.cc',
       'browser/ui/views/download/download_item_view.h',
       'browser/ui/views/download/download_shelf_context_menu_view.cc',
@@ skipping 977 matching lines @@
         }],
         ['enable_spellcheck==1', {
           'dependencies': [
             '../third_party/hunspell/hunspell.gyp:hunspell',
           ],
         }],
       ],
     },
   ],
 }