Purge ImplementsThreadSafeReferenceCounting() from the codebase now that Task is dead.

gpu/gpu_common.gypi

 # 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.
 
 {
   'targets': [
     {
       # Library emulates GLES2 using command_buffers.
       'target_name': 'gles2_implementation',
       'type': '<(component)',
@@ skipping 130 matching lines @@
         '<@(gles2_c_lib_source_files)',
         'command_buffer/client/client_test_helper.cc',
         'command_buffer/client/client_test_helper.h',
         'command_buffer/client/cmd_buffer_helper_test.cc',
         'command_buffer/client/fenced_allocator_test.cc',
         'command_buffer/client/gles2_implementation_unittest.cc',
         'command_buffer/client/mapped_memory_unittest.cc',
         'command_buffer/client/query_tracker_unittest.cc',
         'command_buffer/client/program_info_manager_unittest.cc',
         'command_buffer/client/ring_buffer_test.cc',
-        'command_buffer/client/share_group_unittest.cc',
         'command_buffer/client/transfer_buffer_unittest.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/command_buffer_shared_test.cc',
         'command_buffer/common/gles2_cmd_format_test.cc',
         'command_buffer/common/gles2_cmd_format_test_autogen.h',
         'command_buffer/common/gles2_cmd_utils_unittest.cc',
         'command_buffer/common/id_allocator_test.cc',
         'command_buffer/common/trace_event.h',
@@ skipping 123 matching lines @@
             'test_suite_name': 'gpu_unittests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)gpu_unittests<(SHARED_LIB_SUFFIX)',
             'input_jars_paths': [ '<(PRODUCT_DIR)/lib.java/chromium_base.jar', ],
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }