Refactor SyncedWindowDelegateAndroid into TabModel

chrome/browser/sync/glue/synced_window_delegate_registry.cc

-// Copyright (c) 2012 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 "chrome/browser/sync/glue/synced_window_delegate_registry.h"
-
-#include "base/lazy_instance.h"
-#include "chrome/browser/sync/glue/synced_window_delegate.h"
-
-namespace browser_sync {
-
-namespace {
-base::LazyInstance<std::set<SyncedWindowDelegate*> >::Leaky g_delegates =
-    LAZY_INSTANCE_INITIALIZER;
-}  // namespace
-
-/* static */
-void SyncedWindowDelegateRegistry::Register(SyncedWindowDelegate* delegate) {
-  g_delegates.Pointer()->insert(delegate);
-}
-
-/* static */
-void SyncedWindowDelegateRegistry::Unregister(SyncedWindowDelegate* delegate) {
-  g_delegates.Pointer()->erase(delegate);
-}
-
-/* static */
-const std::set<SyncedWindowDelegate*>&
-SyncedWindowDelegateRegistry::GetSyncedWindowDelegates() {
-  return g_delegates.Get();
-}
-
-}  // namespace browser_sync