remove ETC2/EAC texture support in core WebGL 2

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/env python
 # 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.
 
 """code generator for GLES2 command buffers."""
 
 import itertools
 import os
 import os.path
@@ skipping 10930 matching lines @@
           f.write(code % {
             'name': ToUnderscore(name),
           })
         if named_type.GetValidValuesES3():
           code = """  %(name)s.AddValues(
       valid_%(name)s_table_es3, arraysize(valid_%(name)s_table_es3));
 """
           f.write(code % {
             'name': ToUnderscore(name),
           })
-      f.write("UpdateETCCompressedTextureFormats();");
       f.write("}\n\n");
 
       f.write("void Validators::UpdateETCCompressedTextureFormats() {\n")
       for name in ['CompressedTextureFormat', 'TextureInternalFormatStorage']:
         for fmt in _ETC_COMPRESSED_TEXTURE_FORMATS:
           code = """  %(name)s.AddValue(%(format)s);
 """
           f.write(code % {
             'name': ToUnderscore(name),
             'format': fmt,
@@ skipping 53 matching lines @@
       enums = sorted(_NAMED_TYPE_INFO.keys())
       for enum in enums:
         if _NAMED_TYPE_INFO[enum]['type'] == 'GLenum':
           f.write("std::string GLES2Util::GetString%s(uint32_t value) {\n" %
                      enum)
           valid_list = _NAMED_TYPE_INFO[enum]['valid']
           if 'valid_es3' in _NAMED_TYPE_INFO[enum]:
             for es3_enum in _NAMED_TYPE_INFO[enum]['valid_es3']:
               if not es3_enum in valid_list:
                 valid_list.append(es3_enum)
-          if enum in [
-              'CompressedTextureFormat',
-              'TextureInternalFormatStorage',
-            ]:
-            for es3_enum in _ETC_COMPRESSED_TEXTURE_FORMATS:
-              valid_list.append(es3_enum)
           assert len(valid_list) == len(set(valid_list))
           if len(valid_list) > 0:
             f.write("  static const EnumToString string_table[] = {\n")
             for value in valid_list:
               f.write('    { %s, "%s" },\n' % (value, value))
             f.write("""  };
   return GLES2Util::GetQualifiedEnumString(
       string_table, arraysize(string_table), value);
 }
 
@@ skipping 301 matching lines @@
   Format(gen.generated_cpp_filenames)
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))