Load missing glGetInternalformativRobustANGLE entry point.

ui/gl/gl_stub_autogen_gl.h

 // Copyright 2016 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 438 matching lines @@
 void glGetIntegervFn(GLenum pname, GLint* params) override {}
 void glGetIntegervRobustANGLEFn(GLenum pname,
                                 GLsizei bufSize,
                                 GLsizei* length,
                                 GLint* data) override {}
 void glGetInternalformativFn(GLenum target,
                              GLenum internalformat,
                              GLenum pname,
                              GLsizei bufSize,
                              GLint* params) override {}
+void glGetInternalformativRobustANGLEFn(GLenum target,
+                                        GLenum internalformat,
+                                        GLenum pname,
+                                        GLsizei bufSize,
+                                        GLsizei* length,
+                                        GLint* params) override {}
 void glGetMultisamplefvRobustANGLEFn(GLenum pname,
                                      GLuint index,
                                      GLsizei bufSize,
                                      GLsizei* length,
                                      GLfloat* val) override {}
 void glGetnUniformfvRobustANGLEFn(GLuint program,
                                   GLint location,
                                   GLsizei bufSize,
                                   GLsizei* length,
                                   GLfloat* params) override {}
@@ skipping 716 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;