Renames aura::client::WindowTreeClient to WindowParentingClient

headless/lib/browser/headless_window_tree_client.cc

-// Copyright (c) 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 "headless/lib/browser/headless_window_tree_client.h"
-
-#include "ui/aura/window.h"
-
-namespace headless {
-
-HeadlessWindowTreeClient::HeadlessWindowTreeClient(aura::Window* root_window)
-    : root_window_(root_window) {
-  aura::client::SetWindowTreeClient(root_window_, this);
-}
-
-HeadlessWindowTreeClient::~HeadlessWindowTreeClient() {
-  aura::client::SetWindowTreeClient(root_window_, nullptr);
-}
-
-aura::Window* HeadlessWindowTreeClient::GetDefaultParent(
-    aura::Window* context,
-    aura::Window* window,
-    const gfx::Rect& bounds) {
-  return root_window_;
-}
-
-}  // namespace headless