Added switch to disable specified GL extensions.

ui/gfx/gfx_tests.gyp

 # Copyright 2014 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': 'gfx_unittests',
       'type': '<(gtest_target_type)',
       # iOS uses a small subset of ui. common_sources are the only files that
       # are built on iOS.
       'common_sources' : [
         'font_unittest.cc',
         'image/image_family_unittest.cc',
         'image/image_ios_unittest.mm',
         'image/image_skia_unittest.cc',
         'image/image_unittest.cc',
         'ios/NSString+CrStringDrawing_unittest.mm',
         'ios/uikit_util_unittest.mm',
         'screen_unittest.cc',
         'test/run_all_unittests.cc',
         'text_elider_unittest.cc',
         'text_utils_unittest.cc',
       ],
+      'gl_test_sources' : [
+        '../gl/gl_api_unittest.cc',
+      ],
       'all_sources': [
         '<@(_common_sources)',
+        '<@(_gl_test_sources)',
         'animation/animation_container_unittest.cc',
         'animation/animation_unittest.cc',
         'animation/multi_animation_unittest.cc',
         'animation/slide_animation_unittest.cc',
         'animation/tween_unittest.cc',
         'blit_unittest.cc',
         'break_list_unittest.cc',
         'canvas_unittest.cc',
         'canvas_unittest_mac.mm',
         'codec/jpeg_codec_unittest.cc',
@@ skipping 35 matching lines @@
         'skrect_conversion_unittest.cc',
         'transform_util_unittest.cc',
         'utf16_indexing_unittest.cc',
       ],
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../../third_party/libpng/libpng.gyp:libpng',
+        '../../ui/gl/gl.gyp:gl',
         '../base/ui_base.gyp:ui_base',
         '../resources/ui_resources.gyp:ui_test_pak',
         'gfx.gyp:gfx',
         'gfx.gyp:gfx_geometry',
         'gfx.gyp:gfx_test_support',
       ],
       'conditions': [
         ['OS == "ios"', {
           'sources': ['<@(_common_sources)'],
         }, {  # OS != "ios"
@@ skipping 98 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }