Make the fuchsia mojo/public repo the source of truth.

mojo/public/platform/native/gles2_impl_thunks.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.
-
-#ifndef MOJO_PUBLIC_PLATFORM_NATIVE_GLES2_IMPL_THUNKS_H_
-#define MOJO_PUBLIC_PLATFORM_NATIVE_GLES2_IMPL_THUNKS_H_
-
-#include <GLES2/gl2.h>
-#include <stddef.h>
-
-// Like MojoGLES2ControlThunks, but specifies the frozen GLES2 API. Separated
-// out as MojoGLES2ControlThunks may be modified and added to, but this
-// interface is frozen.
-#pragma pack(push, 8)
-struct MojoGLES2ImplThunks {
-  size_t size;  // Should be set to sizeof(MojoGLES2ImplThunks).
-
-#define VISIT_GL_CALL(Function, ReturnType, PARAMETERS, ARGUMENTS) \
-  ReturnType(GL_APIENTRY *Function) PARAMETERS;
-#include "mojo/public/platform/native/gles2/call_visitor_autogen.h"
-#undef VISIT_GL_CALL
-};
-#pragma pack(pop)
-
-// Intended to be called from the embedder to get the embedder's implementation
-// of GLES2.
-inline struct MojoGLES2ImplThunks MojoMakeGLES2ImplThunks() {
-  struct MojoGLES2ImplThunks gles2_impl_thunks = {
-      sizeof(struct MojoGLES2ImplThunks),
-#define VISIT_GL_CALL(Function, ReturnType, PARAMETERS, ARGUMENTS) gl##Function,
-#include "mojo/public/platform/native/gles2/call_visitor_autogen.h"
-#undef VISIT_GL_CALL
-  };
-
-  return gles2_impl_thunks;
-}
-
-// Use this type for the function found by dynamically discovering it in
-// a DSO linked with mojo_system. For example:
-// MojoSetGLES2ImplThunksFn mojo_set_gles2_impl_thunks_fn =
-//     reinterpret_cast<MojoSetGLES2ImplThunksFn>(
-//         app_library.GetFunctionPointer("MojoSetGLES2ImplThunks"));
-// The expected size of |gles2_impl_thunks| is returned.
-// The contents of |gles2_impl_thunks| are copied.
-typedef size_t (*MojoSetGLES2ImplThunksFn)(
-    const struct MojoGLES2ImplThunks* gles2_impl_thunks);
-
-#endif  // MOJO_PUBLIC_PLATFORM_NATIVE_GLES2_IMPL_THUNKS_H_