Add support for all blendmodes if we have GL_KHR_blend_equation_advanced.

gpu/command_buffer/client/gles2_c_lib_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 940 matching lines @@
                                                       uv_y,
                                                       uv_width,
                                                       uv_height);
 }
 void GLES2MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) {
   gles2::GetGLContext()->MatrixLoadfCHROMIUM(matrixMode, m);
 }
 void GLES2MatrixLoadIdentityCHROMIUM(GLenum matrixMode) {
   gles2::GetGLContext()->MatrixLoadIdentityCHROMIUM(matrixMode);
 }
+void GLES2BlendBarrierKHR() {
+  gles2::GetGLContext()->BlendBarrierKHR();
+}
 
 namespace gles2 {
 
 extern const NameToFunc g_gles2_function_table[] = {
     {
      "glActiveTexture",
      reinterpret_cast<GLES2FunctionPointer>(glActiveTexture),
     },
     {
      "glAttachShader",
@@ skipping 839 matching lines @@
     },
     {
      "glMatrixLoadfCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glMatrixLoadfCHROMIUM),
     },
     {
      "glMatrixLoadIdentityCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glMatrixLoadIdentityCHROMIUM),
     },
     {
+     "glBlendBarrierKHR",
+     reinterpret_cast<GLES2FunctionPointer>(glBlendBarrierKHR),
+    },
+    {
      NULL,
      NULL,
     },
 };
 
 }  // namespace gles2
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_C_LIB_AUTOGEN_H_