[Command buffer] Enable primitive restart for WebGL 2

ui/gl/gl_bindings_api_autogen_gl.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
 // ui/gl/generate_bindings.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 508 matching lines @@
                         GLenum coordType,
                         const GLvoid* coords) override;
 void glPathParameterfNVFn(GLuint path, GLenum pname, GLfloat value) override;
 void glPathParameteriNVFn(GLuint path, GLenum pname, GLint value) override;
 void glPathStencilFuncNVFn(GLenum func, GLint ref, GLuint mask) override;
 void glPauseTransformFeedbackFn(void) override;
 void glPixelStoreiFn(GLenum pname, GLint param) override;
 void glPointParameteriFn(GLenum pname, GLint param) override;
 void glPolygonOffsetFn(GLfloat factor, GLfloat units) override;
 void glPopGroupMarkerEXTFn(void) override;
+void glPrimitiveRestartIndexFn(GLuint index) override;
 void glProgramBinaryFn(GLuint program,
                        GLenum binaryFormat,
                        const GLvoid* binary,
                        GLsizei length) override;
 void glProgramParameteriFn(GLuint program, GLenum pname, GLint value) override;
 void glProgramPathFragmentInputGenNVFn(GLuint program,
                                        GLint location,
                                        GLenum genMode,
                                        GLint components,
                                        const GLfloat* coeffs) override;
@@ skipping 285 matching lines @@
                               GLsizei stride,
                               const void* ptr) override;
 void glVertexAttribPointerFn(GLuint indx,
                              GLint size,
                              GLenum type,
                              GLboolean normalized,
                              GLsizei stride,
                              const void* ptr) override;
 void glViewportFn(GLint x, GLint y, GLsizei width, GLsizei height) override;
 GLenum glWaitSyncFn(GLsync sync, GLbitfield flags, GLuint64 timeout) override;