Remove flip_y, premultiply_alpha, unmultiply_alpha support in command buffer.

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 743 matching lines @@
       'GL_SAMPLE_COVERAGE_VALUE',
       'GL_SAMPLES',
       'GL_SCISSOR_BOX',
       'GL_SHADER_BINARY_FORMATS',
       'GL_SHADER_COMPILER',
       'GL_SUBPIXEL_BITS',
       'GL_STENCIL_BITS',
       'GL_TEXTURE_BINDING_2D',
       'GL_TEXTURE_BINDING_CUBE_MAP',
       'GL_UNPACK_ALIGNMENT',
-      'GL_UNPACK_FLIP_Y_CHROMIUM',
-      'GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM',
-      'GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM',
       'GL_BIND_GENERATES_RESOURCE_CHROMIUM',
       # we can add this because we emulate it if the driver does not support it.
       'GL_VERTEX_ARRAY_BINDING_OES',
       'GL_VIEWPORT',
     ],
     'valid_es3': [
       'GL_COPY_READ_BUFFER_BINDING',
       'GL_COPY_WRITE_BUFFER_BINDING',
       'GL_DRAW_BUFFER0',
       'GL_DRAW_BUFFER1',
@@ skipping 628 matching lines @@
       'GL_FASTEST',
       'GL_NICEST',
       'GL_DONT_CARE',
     ],
   },
   'PixelStore': {
     'type': 'GLenum',
     'valid': [
       'GL_PACK_ALIGNMENT',
       'GL_UNPACK_ALIGNMENT',
-      'GL_UNPACK_FLIP_Y_CHROMIUM',
-      'GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM',
-      'GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM',
     ],
     'valid_es3': [
       'GL_PACK_ROW_LENGTH',
       'GL_PACK_SKIP_PIXELS',
       'GL_PACK_SKIP_ROWS',
       'GL_UNPACK_ROW_LENGTH',
       'GL_UNPACK_IMAGE_HEIGHT',
       'GL_UNPACK_SKIP_PIXELS',
       'GL_UNPACK_SKIP_ROWS',
       'GL_UNPACK_SKIP_IMAGES',
@@ skipping 9671 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:]))