Allow textures to be moved from one GL context group to another.

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 205 matching lines @@
         'gles2_cmd_helper',
       ],
       'defines': [
         'GLES2_C_LIB_IMPLEMENTATION',
       ],
       'sources': [
         '<@(gles2_c_lib_source_files)',
         'command_buffer/tests/gl_tests_main.cc',
         'command_buffer/tests/gl_manager.cc',
         'command_buffer/tests/gl_manager.h',
+        'command_buffer/tests/gl_texture_mailbox_unittests.cc',
         'command_buffer/tests/gl_unittests.cc',
       ],
     },
     {
       'target_name': 'gpu_unittest_utils',
       'type': 'static_library',
       'dependencies': [
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../ui/gfx/gl/gl.gyp:gl',
       ],
       'include_dirs': [
         '..',
         '<(DEPTH)/third_party/khronos',
       ],
       'sources': [
         'command_buffer/common/gl_mock.h',
         'command_buffer/common/gl_mock.cc',
         'command_buffer/service/gles2_cmd_decoder_mock.cc',
         'command_buffer/service/gles2_cmd_decoder_mock.cc',
       ],
     },
   ],
 }