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

ash/mus/bridge/wm_shell_mus.cc

Index: ash/mus/bridge/wm_shell_mus.cc
diff --git a/ash/mus/bridge/wm_shell_mus.cc b/ash/mus/bridge/wm_shell_mus.cc
index 195250df2644716dc4aec814cbbce0e2c7711a89..f6aacd9ae83e576c9c766b88bf8ca50358ea7b2f 100644
--- a/ash/mus/bridge/wm_shell_mus.cc
+++ b/ash/mus/bridge/wm_shell_mus.cc
@@ -313,13 +313,12 @@ void WmShellMus::RemoveDisplayObserver(WmDisplayObserver* observer) {
   NOTIMPLEMENTED();
 }
 
-void WmShellMus::AddPointerDownWatcher(views::PointerDownWatcher* watcher) {
-  // TODO(jamescook): Move PointerDownWatcherDelegateMus to //ash/mus
-  // and use here.
+void WmShellMus::AddPointerWatcher(views::PointerWatcher* watcher) {
+  // TODO(jamescook): Move PointerWatcherDelegateMus to //ash/mus and use here.
   NOTIMPLEMENTED();
 }
 
-void WmShellMus::RemovePointerDownWatcher(views::PointerDownWatcher* watcher) {
+void WmShellMus::RemovePointerWatcher(views::PointerWatcher* watcher) {
   NOTIMPLEMENTED();
 }