Fix remaining shared_library link_settings propagation

ui/events/events.gyp

 # 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 97 matching lines @@
           'sources!': [
             'event_utils.cc',
             'keycodes/keyboard_code_conversion.cc',
           ],
         }],
         ['use_x11==1', {
           'dependencies': [
             '<(DEPTH)/build/linux/system.gyp:x11',
           ],
         }],
+        ['OS=="mac"', {
+          'link_settings': {
+            'libraries': [
+              '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
+              '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
+            ],
+          },
+        }],
       ],
     }
   ],
 }