Make gl_bindings_skia_in_process work with OpenGL ES3

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 358 matching lines @@
 void glGetShaderivFn(GLuint shader, GLenum pname, GLint* params) override;
 void glGetShaderPrecisionFormatFn(GLenum shadertype,
                                   GLenum precisiontype,
                                   GLint* range,
                                   GLint* precision) override;
 void glGetShaderSourceFn(GLuint shader,
                          GLsizei bufsize,
                          GLsizei* length,
                          char* source) override;
 const GLubyte* glGetStringFn(GLenum name) override;
+const GLubyte* glGetStringiFn(GLenum name, GLuint index) override;
 void glGetSyncivFn(GLsync sync,
                    GLenum pname,
                    GLsizei bufSize,
                    GLsizei* length,
                    GLint* values) override;
 void glGetTexLevelParameterfvFn(GLenum target,
                                 GLint level,
                                 GLenum pname,
                                 GLfloat* params) override;
 void glGetTexLevelParameterivFn(GLenum target,
@@ skipping 306 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;