chromeos: Move files in //ash/common to //ash, part 1

ash/common/system/tiles/tray_tiles.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 "ash/common/system/tiles/tray_tiles.h"
-
-#include "ash/common/metrics/user_metrics_action.h"
-#include "ash/common/session/session_state_delegate.h"
-#include "ash/common/system/tiles/tiles_default_view.h"
-#include "ash/common/wm_shell.h"
-
-namespace ash {
-
-TrayTiles::TrayTiles(SystemTray* system_tray)
-    : SystemTrayItem(system_tray, UMA_NOT_RECORDED), default_view_(nullptr) {}
-
-TrayTiles::~TrayTiles() {}
-
-views::View* TrayTiles::GetHelpButtonView() const {
-  if (!default_view_)
-    return nullptr;
-  return default_view_->GetHelpButtonView();
-}
-
-TilesDefaultView* TrayTiles::GetDefaultViewForTesting() const {
-  return default_view_;
-}
-
-views::View* TrayTiles::CreateDefaultViewForTesting(LoginStatus status) {
-  return CreateDefaultView(status);
-}
-
-views::View* TrayTiles::CreateDefaultView(LoginStatus status) {
-  CHECK(default_view_ == nullptr);
-  default_view_ = new TilesDefaultView(this, status);
-  default_view_->Init();
-  return default_view_;
-}
-
-void TrayTiles::DestroyDefaultView() {
-  default_view_ = nullptr;
-}
-
-}  // namespace ash