Rename AppsClient -> AppWindowClient

extensions/browser/app_window/apps_client.cc

-// 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.
-
-#include "extensions/browser/app_window/apps_client.h"
-
-#include "base/basictypes.h"
-
-namespace extensions {
-
-namespace {
-
-AppsClient* g_client = NULL;
-
-}  // namespace
-
-AppsClient* AppsClient::Get() {
-  return g_client;
-}
-
-void AppsClient::Set(AppsClient* client) {
-  // This can happen in unit tests, where the utility thread runs in-process.
-  if (g_client)
-    return;
-
-  g_client = client;
-}
-
-}  // namespace extensions