Revert of mus: Rename .*PointerWatcher.* to .*PointerDownWatcher.*.

ash/sysui/pointer_watcher_delegate_mus.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/sysui/pointer_watcher_delegate_mus.h"
+
+#include "ui/views/mus/window_manager_connection.h"
+
+namespace ash {
+
+PointerWatcherDelegateMus::PointerWatcherDelegateMus() {}
+
+PointerWatcherDelegateMus::~PointerWatcherDelegateMus() {}
+
+void PointerWatcherDelegateMus::AddPointerWatcher(
+    views::PointerWatcher* watcher) {
+  views::WindowManagerConnection::Get()->AddPointerWatcher(watcher);
+}
+
+void PointerWatcherDelegateMus::RemovePointerWatcher(
+    views::PointerWatcher* watcher) {
+  views::WindowManagerConnection::Get()->RemovePointerWatcher(watcher);
+}
+
+}  // namespace ash