command_buffer: Implement CHROMIUM_framebuffer_mixed_samples extension

gpu/command_buffer/service/gles2_cmd_validation_autogen.h

 // Copyright 2014 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 73 matching lines @@
 
 ValueValidator<GLenum> bufferuiv;
 ValueValidator<GLenum> capability;
 class CmpFunctionValidator {
  public:
   bool IsValid(const GLenum value) const;
 };
 CmpFunctionValidator cmp_function;
 
 ValueValidator<GLenum> compressed_texture_format;
+ValueValidator<GLenum> coverage_modulation_components;
 class DrawModeValidator {
  public:
   bool IsValid(const GLenum value) const;
 };
 DrawModeValidator draw_mode;
 
 ValueValidator<GLenum> dst_blend_factor;
 ValueValidator<GLenum> equation;
 class FaceModeValidator {
  public:
@@ skipping 278 matching lines @@
  public:
   bool IsValid(const GLenum value) const;
 };
 VertexAttribITypeValidator vertex_attrib_i_type;
 
 ValueValidator<GLenum> vertex_attrib_type;
 ValueValidator<GLenum> vertex_attribute;
 ValueValidator<GLenum> vertex_pointer;
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_AUTOGEN_H_