Add gl.dll, compositor.dll, and surface.dll.

ui/gfx/gl/gl.gyp

 # Copyright (c) 2011 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': [
     {
       'target_name': 'gl',
-      'type': 'static_library',
+      'type': '<(component)',
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/ui/ui.gyp:ui',
       ],
       'variables': {
         'gl_binding_output_dir': '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gl',
       },
+      'defines': [
+        'GL_IMPLEMENTATION',
+      ],
       'include_dirs': [
         '<(DEPTH)/third_party/swiftshader/include',
         '<(DEPTH)/third_party/mesa/MesaLib/include',
         '<(gl_binding_output_dir)',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '<(DEPTH)/third_party/mesa/MesaLib/include',
           '<(gl_binding_output_dir)',
         ],
       },
      'sources': [
         'gl_bindings.h',
         'gl_bindings_skia_in_process.cc',
         'gl_bindings_skia_in_process.h',
         'gl_context.cc',
         'gl_context.h',
         'gl_context_linux.cc',
         'gl_context_mac.cc',
         'gl_context_osmesa.cc',
         'gl_context_osmesa.h',
         'gl_context_stub.cc',
         'gl_context_stub.h',
         'gl_context_win.cc',
+        'gl_export.h',
         'gl_implementation.cc',
         'gl_implementation.h',
         'gl_implementation_linux.cc',
         'gl_implementation_mac.cc',
         'gl_implementation_win.cc',
         'gl_interface.cc',
         'gl_interface.h',
         'gl_share_group.cc',
         'gl_share_group.h',
         'gl_surface.cc',
@@ skipping 101 matching lines @@
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/OpenGL.framework',
             ],
           },
         }],
       ],
     },
   ],
 }