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

ash/aura/wm_shell_aura.cc

Index: ash/aura/wm_shell_aura.cc
diff --git a/ash/aura/wm_shell_aura.cc b/ash/aura/wm_shell_aura.cc
index 3908dad13ef87617561c0a48093cb7b995979f1a..6ea068cf1ba414fa0dfee8f14a2daf2e85afa234 100644
--- a/ash/aura/wm_shell_aura.cc
+++ b/ash/aura/wm_shell_aura.cc
@@ -205,12 +205,12 @@ void WmShellAura::RemoveDisplayObserver(WmDisplayObserver* observer) {
   display_observers_.RemoveObserver(observer);
 }
 
-void WmShellAura::AddPointerWatcher(views::PointerWatcher* watcher) {
-  Shell::GetInstance()->AddPointerWatcher(watcher);
+void WmShellAura::AddPointerDownWatcher(views::PointerDownWatcher* watcher) {
+  Shell::GetInstance()->AddPointerDownWatcher(watcher);
 }
 
-void WmShellAura::RemovePointerWatcher(views::PointerWatcher* watcher) {
-  Shell::GetInstance()->RemovePointerWatcher(watcher);
+void WmShellAura::RemovePointerDownWatcher(views::PointerDownWatcher* watcher) {
+  Shell::GetInstance()->RemovePointerDownWatcher(watcher);
 }
 
 #if defined(OS_CHROMEOS)