Decouple GpuCompositorFrameSink from DisplayCompositor

services/ui/surfaces/gpu_offscreen_compositor_frame_sink.cc

-// Copyright 2017 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/surfaces/gpu_offscreen_compositor_frame_sink.h"
-
-namespace ui {
-
-GpuOffscreenCompositorFrameSink::GpuOffscreenCompositorFrameSink(
-    DisplayCompositor* display_compositor,
-    const cc::FrameSinkId& frame_sink_id,
-    cc::mojom::MojoCompositorFrameSinkRequest request,
-    cc::mojom::MojoCompositorFrameSinkPrivateRequest
-        compositor_frame_sink_private_request,
-    cc::mojom::MojoCompositorFrameSinkClientPtr client)
-    : GpuCompositorFrameSink(display_compositor,
-                             frame_sink_id,
-                             nullptr,
-                             nullptr,
-                             std::move(compositor_frame_sink_private_request),
-                             std::move(client)),
-      binding_(this, std::move(request)) {
-  binding_.set_connection_error_handler(
-      base::Bind(&GpuOffscreenCompositorFrameSink::OnClientConnectionLost,
-                 base::Unretained(this)));
-}
-
-GpuOffscreenCompositorFrameSink::~GpuOffscreenCompositorFrameSink() = default;
-
-}  // namespace ui