Fix errors found in Mac gn component builds

ui/surface/surface.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
   },
   'target_defaults': {
     'conditions': [
       ['use_x11 == 1', {
         'include_dirs': [
           '../../third_party/khronos',
         ],
       }],
       ['OS == "mac"', {
+        # Required by accelerated_surface_mac.cc.
         'link_settings': {
           'libraries': [
             '$(SDKROOT)/System/Library/Frameworks/IOSurface.framework',
+            '$(SDKROOT)/System/Library/Frameworks/OpenGL.framework',
           ],
         },
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'surface',
       'type': '<(component)',
       'dependencies': [
@@ skipping 12 matching lines @@
         'transport_dib.h',
         'transport_dib_posix.cc',
         'transport_dib_win.cc',
       ],
       'defines': [
         'SURFACE_IMPLEMENTATION',
       ],
     },
   ],
 }