command_buffer: Implement glGetStringi for GL ES 3.0

mojo/gpu/mojo_gles2_impl_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 276 matching lines @@
                         char* infolog) override;
   void GetShaderPrecisionFormat(GLenum shadertype,
                                 GLenum precisiontype,
                                 GLint* range,
                                 GLint* precision) override;
   void GetShaderSource(GLuint shader,
                        GLsizei bufsize,
                        GLsizei* length,
                        char* source) override;
   const GLubyte* GetString(GLenum name) override;
+  const GLubyte* GetStringi(GLenum name, GLuint index) override;
   void GetSynciv(GLsync sync,
                  GLenum pname,
                  GLsizei bufsize,
                  GLsizei* length,
                  GLint* values) override;
   void GetTexParameterfv(GLenum target, GLenum pname, GLfloat* params) override;
   void GetTexParameteriv(GLenum target, GLenum pname, GLint* params) override;
   void GetTransformFeedbackVarying(GLuint program,
                                    GLuint index,
                                    GLsizei bufsize,
@@ skipping 580 matching lines @@
                                GLuint colorNumber,
                                const char* name) override;
   GLint GetFragDataIndexEXT(GLuint program, const char* name) override;
 
  private:
   MojoGLES2Context context_;
 };
 
 }  // namespace mojo
 #endif  // MOJO_GPU_MOJO_GLES2_IMPL_AUTOGEN_H_