GN: Remove duplicate entries from sources lists

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 334 matching lines @@
       'browser/ui/cocoa/constrained_window/constrained_window_alert.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_animation.h',
       'browser/ui/cocoa/constrained_window/constrained_window_animation.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_button.h',
       'browser/ui/cocoa/constrained_window/constrained_window_button.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_control_utils.h',
       'browser/ui/cocoa/constrained_window/constrained_window_control_utils.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h',
       'browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_custom_window.h',
-      'browser/ui/cocoa/constrained_window/constrained_window_custom_window.h',
       'browser/ui/cocoa/constrained_window/constrained_window_custom_window.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_mac.h',
       'browser/ui/cocoa/constrained_window/constrained_window_mac.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_sheet.h',
       'browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h',
       'browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.mm',
       'browser/ui/cocoa/constrained_window/constrained_window_sheet_info.h',
       'browser/ui/cocoa/constrained_window/constrained_window_sheet_info.mm',
       'browser/ui/cocoa/content_settings/collected_cookies_mac.h',
       'browser/ui/cocoa/content_settings/collected_cookies_mac.mm',
@@ skipping 2592 matching lines @@
         }],
         ['OS!="android" and OS!="ios"', {
           'dependencies': [
             '../device/bluetooth/bluetooth.gyp:device_bluetooth',
           ],
         }],
       ],
     },
   ],
 }