Make gl_bindings_skia_in_process work with OpenGL ES3

ui/gl/gl_mock_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 @@
 MOCK_METHOD3(GetShaderiv, void(GLuint shader, GLenum pname, GLint* params));
 MOCK_METHOD4(GetShaderPrecisionFormat,
              void(GLenum shadertype,
                   GLenum precisiontype,
                   GLint* range,
                   GLint* precision));
 MOCK_METHOD4(
     GetShaderSource,
     void(GLuint shader, GLsizei bufsize, GLsizei* length, char* source));
 MOCK_METHOD1(GetString, const GLubyte*(GLenum name));
+MOCK_METHOD2(GetStringi, const GLubyte*(GLenum name, GLuint index));
 MOCK_METHOD5(GetSynciv,
              void(GLsync sync,
                   GLenum pname,
                   GLsizei bufSize,
                   GLsizei* length,
                   GLint* values));
 MOCK_METHOD4(GetTexLevelParameterfv,
              void(GLenum target, GLint level, GLenum pname, GLfloat* params));
 MOCK_METHOD4(GetTexLevelParameteriv,
              void(GLenum target, GLint level, GLenum pname, GLint* params));
@@ skipping 312 matching lines @@
                   const void* ptr));
 MOCK_METHOD6(VertexAttribPointer,
              void(GLuint indx,
                   GLint size,
                   GLenum type,
                   GLboolean normalized,
                   GLsizei stride,
                   const void* ptr));
 MOCK_METHOD4(Viewport, void(GLint x, GLint y, GLsizei width, GLsizei height));
 MOCK_METHOD3(WaitSync, GLenum(GLsync sync, GLbitfield flags, GLuint64 timeout));