Add glUniformBlockBinding to GPU command buffer.

gpu/command_buffer/client/gles2_implementation_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 567 matching lines @@
 void Uniform4iv(GLint location, GLsizei count, const GLint* v) override;
 
 void Uniform4ui(GLint location,
                 GLuint x,
                 GLuint y,
                 GLuint z,
                 GLuint w) override;
 
 void Uniform4uiv(GLint location, GLsizei count, const GLuint* v) override;
 
+void UniformBlockBinding(GLuint program, GLuint index, GLuint binding) override;
+
 void UniformMatrix2fv(GLint location,
                       GLsizei count,
                       GLboolean transpose,
                       const GLfloat* value) override;
 
 void UniformMatrix2x3fv(GLint location,
                         GLsizei count,
                         GLboolean transpose,
                         const GLfloat* value) override;
 
@@ skipping 345 matching lines @@
 
 void SwapInterval(GLint interval) override;
 
 void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) override;
 
 void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) override;
 
 void BlendBarrierKHR() override;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_