gles2_conform: Fix sources list in GN/gypi.

gpu/gles2_conform_support/gles2_conform.gypi

 # Copyright (c) 2013 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': {
     'gl2_extension_test_sources': [
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/GL2ExtensionTests/GTFExtensionTestCompressedETC1RGB8Texture.c',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/GL2ExtensionTests/GTFExtensionTestCompressedETC1RGB8Texture.h',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/GL2ExtensionTests/GTFExtensionTestCompressedPalettedTexture.c',
@@ skipping 283 matching lines @@
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglu.h',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglut.c',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglut.h',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/gl2Native.c',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/gl2Native.h',
       '<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/gl2ext_missing.h',
       #'<(DEPTH)/third_party/gles2_conform/GTF_ES/glsl/GTF/Source/main.c',
       '<(SHARED_INTERMEDIATE_DIR)/gles2_conform_test_embedded_data/FilesDATA.c',
       '<(SHARED_INTERMEDIATE_DIR)/gles2_conform_test_embedded_data/FilesDATA.h',
       '<(SHARED_INTERMEDIATE_DIR)/gles2_conform_test_embedded_data/FilesTOC.c',
-      '<@(gl2_extension_test_sources)',
-      '<@(gl2_fixed_test_sources)',
-      '<@(gl2_test_sources)',
     ],
   },
   # We cannot have any targets here because these tests are compiled against
   # multiple platforms - ANGLE, CommandBufferService, and Pepper. Each platform
   # has different EGL headers.
 }
 
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