Revert 88452 (broke gpu_unittests) - Fix LUMANINCE_ALPHA issue

gpu/gpu.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,
     # These are defined here because we need to build this library twice. Once
     # with extra parameter checking. Once with no parameter checking to be 100%
     # OpenGL ES 2.0 compliant for the conformance tests.
@@ skipping 251 matching lines @@
         'command_buffer/client/gles2_implementation_unittest.cc',
         'command_buffer/client/mapped_memory_unittest.cc',
         'command_buffer/client/ring_buffer_test.cc',
         'command_buffer/common/bitfield_helpers_test.cc',
         'command_buffer/common/command_buffer_mock.cc',
         'command_buffer/common/command_buffer_mock.h',
         'command_buffer/common/gles2_cmd_format_test.cc',
         'command_buffer/common/gles2_cmd_format_test_autogen.h',
         'command_buffer/common/gles2_cmd_id_test.cc',
         'command_buffer/common/gles2_cmd_id_test_autogen.h',
-        'command_buffer/common/gles2_cmd_utils_unittest.cc',
         'command_buffer/common/id_allocator_test.cc',
         'command_buffer/common/trace_event.h',
         'command_buffer/common/unittest_main.cc',
         'command_buffer/service/buffer_manager_unittest.cc',
         'command_buffer/service/cmd_parser_test.cc',
         'command_buffer/service/common_decoder_unittest.cc',
         'command_buffer/service/context_group_unittest.cc',
         'command_buffer/service/feature_info_unittest.cc',
         'command_buffer/service/framebuffer_manager_unittest.cc',
         'command_buffer/service/gles2_cmd_decoder_unittest.cc',
@@ skipping 96 matching lines @@
       },
     ],
   ],
 }
 
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