Delete dead (and obsolete) display compositor API

services/ui/gpu/display_compositor/display_impl.cc

-// 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.
-
-#include "services/ui/gpu/display_compositor/display_impl.h"
-
-#include "services/ui/gpu/display_compositor/compositor_frame_sink_impl.h"
-
-namespace ui {
-namespace gpu {
-
-DisplayImpl::DisplayImpl(
-    int accelerated_widget,
-    mojo::InterfaceRequest<mojom::Display> display,
-    mojom::DisplayHostPtr host,
-    mojo::InterfaceRequest<mojom::CompositorFrameSink> sink,
-    mojom::CompositorFrameSinkClientPtr client,
-    const scoped_refptr<DisplayCompositor>& display_compositor)
-    : binding_(this, std::move(display)) {
-  const uint32_t client_id = 1;
-  sink_.reset(new CompositorFrameSinkImpl(this, client_id, display_compositor,
-                                          std::move(sink), std::move(client)));
-}
-
-DisplayImpl::~DisplayImpl() {}
-
-void DisplayImpl::CreateClient(
-    uint32_t client_id,
-    mojo::InterfaceRequest<mojom::DisplayClient> client) {
-  NOTIMPLEMENTED();
-}
-
-void DisplayImpl::CompositorFrameSinkConnectionLost(int sink_id) {
-  NOTIMPLEMENTED();
-}
-
-cc::SurfaceId DisplayImpl::GenerateSurfaceId() {
-  NOTIMPLEMENTED();
-  return cc::SurfaceId();
-}
-
-}  // namespace gpu
-}  // namespace ui