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

ash/sysui/pointer_down_watcher_delegate_mus.h

Index: ash/sysui/pointer_down_watcher_delegate_mus.h
diff --git a/ash/sysui/pointer_down_watcher_delegate_mus.h b/ash/sysui/pointer_down_watcher_delegate_mus.h
new file mode 100644
index 0000000000000000000000000000000000000000..b0b12eceee194a88aeef8a4f02a5304f659b7222
--- /dev/null
+++ b/ash/sysui/pointer_down_watcher_delegate_mus.h
@@ -0,0 +1,29 @@
+// 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.
+
+#ifndef ASH_SYSUI_POINTER_DOWN_WATCHER_DELEGATE_MUS_H_
+#define ASH_SYSUI_POINTER_DOWN_WATCHER_DELEGATE_MUS_H_
+
+#include "ash/common/pointer_down_watcher_delegate.h"
+#include "base/macros.h"
+
+namespace ash {
+
+// PointerDownWatcher support on mus via the WindowManagerConnection.
+class PointerDownWatcherDelegateMus : public PointerDownWatcherDelegate {
+ public:
+  PointerDownWatcherDelegateMus();
+  ~PointerDownWatcherDelegateMus() override;
+
+  // PointerDownWatcherDelegate:
+  void AddPointerDownWatcher(views::PointerDownWatcher* watcher) override;
+  void RemovePointerDownWatcher(views::PointerDownWatcher* watcher) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PointerDownWatcherDelegateMus);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSUI_POINTER_DOWN_WATCHER_DELEGATE_MUS_H_