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

ash/sysui/pointer_down_watcher_delegate_mus.cc

Index: ash/sysui/pointer_down_watcher_delegate_mus.cc
diff --git a/ash/sysui/pointer_down_watcher_delegate_mus.cc b/ash/sysui/pointer_down_watcher_delegate_mus.cc
deleted file mode 100644
index 9dc01d8ab1f6c5ebd477c4991ee33a2c3b4e6a62..0000000000000000000000000000000000000000
--- a/ash/sysui/pointer_down_watcher_delegate_mus.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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_down_watcher_delegate_mus.h"
-
-#include "ui/views/mus/window_manager_connection.h"
-
-namespace ash {
-
-PointerDownWatcherDelegateMus::PointerDownWatcherDelegateMus() {}
-
-PointerDownWatcherDelegateMus::~PointerDownWatcherDelegateMus() {}
-
-void PointerDownWatcherDelegateMus::AddPointerDownWatcher(
-    views::PointerDownWatcher* watcher) {
-  views::WindowManagerConnection::Get()->AddPointerDownWatcher(watcher);
-}
-
-void PointerDownWatcherDelegateMus::RemovePointerDownWatcher(
-    views::PointerDownWatcher* watcher) {
-  views::WindowManagerConnection::Get()->RemovePointerDownWatcher(watcher);
-}
-
-}  // namespace ash