Revert of command_buffer_gles2: Add test command_buffer_gles2_test for command_buffer_gles2

gpu/gles2_conform_support/egl/test_support.h

-// Copyright (c) 2016 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.
-
-#ifndef GPU_GLES2_CONFORM_SUPPORT_EGL_TEST_SUPPORT_H_
-#define GPU_GLES2_CONFORM_SUPPORT_EGL_TEST_SUPPORT_H_
-
-#if defined(COMPONENT_BUILD) && defined(COMMAND_BUFFER_GLES_LIB_SUPPORT_ONLY)
-// A variable used for communicating whether the app has initialized the global
-// variables.
-// On component build, the dynamic library and the Chromium test
-// runner executable refer to the same global variables. Any non-Chromium client
-// of the dynamic library will not initialize the globabl variables.
-// On non-component (static) build, the library and the runner have distinct
-// global variables.
-EGLAPI extern EGLAPIENTRY bool g_command_buffer_gles_has_atexit_manager;
-
-#endif
-
-#endif