gl: Move platform-specific EGL code into separate files

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 79 matching lines @@
         'gl_implementation_win.cc',
         'gl_implementation_x11.cc',
         'gl_osmesa_api_implementation.cc',
         'gl_osmesa_api_implementation.h',
         'gl_share_group.cc',
         'gl_share_group.h',
         'gl_state_restorer.cc',
         'gl_state_restorer.h',
         'gl_surface.cc',
         'gl_surface.h',
+        'gl_surface_android.cc',
         'gl_surface_mac.cc',
         'gl_surface_stub.cc',
         'gl_surface_stub.h',
         'gl_surface_win.cc',
         'gl_surface_x11.cc',
         'gl_surface_osmesa.cc',
         'gl_surface_osmesa.h',
+        'gl_surface_ozone.cc',
         'gl_switches.cc',
         'gl_switches.h',
         'gl_version_info.cc',
         'gl_version_info.h',
         'gpu_switching_manager.cc',
         'gpu_switching_manager.h',
         'io_surface_support_mac.cc',
         'io_surface_support_mac.h',
         'scoped_binders.cc',
         'scoped_binders.h',
@@ skipping 242 matching lines @@
         },
       ],
     }],
     ['OS=="android" and android_webview_build==0', {
       'dependencies': [
         '../android/ui_android.gyp:ui_java',
       ],
     }],
   ],
 }