Mac Overlays: Wire up overlays on Mac

ui/gl/gl.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,
   },
 
   'targets': [
@@ skipping 207 matching lines @@
             '<(DEPTH)/third_party/angle/src/angle.gyp:libEGL',
             '<(DEPTH)/third_party/angle/src/angle.gyp:libGLESv2',
           ],
         }],
         ['OS=="mac"', {
           'sources': [
             'gl_context_cgl.cc',
             'gl_context_cgl.h',
             'gl_fence_apple.cc',
             'gl_fence_apple.h',
-            'gl_image_io_surface.cc',
+            'gl_image_io_surface.mm',
             'gl_image_io_surface.h',
             'scoped_cgl.cc',
             'scoped_cgl.h',
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/IOSurface.framework',
               '$(SDKROOT)/System/Library/Frameworks/OpenGL.framework',
+              '$(SDKROOT)/System/Library/Frameworks/Quartz.framework',
             ],
           },
         }],
         ['OS=="android"', {
           'dependencies': [
             'gl_jni_headers',
             '../android/ui_android.gyp:ui_java',
           ],
           'sources': [
             'gl_image_surface_texture.cc',
@@ skipping 93 matching lines @@
           ],
           'variables': {
             'jni_gen_package': 'ui/gl',
           },
           'includes': [ '../../build/jni_generator.gypi' ],
         },
       ],
     }],
   ],
 }