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

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index e3fee20c9fe9963827b8c627c017b29fdcafd1c9..b5e9d9ce456a84af572842d26afe97b0aeb6ead6 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -15,7 +15,7 @@
 #include "ash/common/wm/window_state.h"
 #include "ash/default_user_wallpaper_delegate.h"
 #include "ash/new_window_delegate.h"
-#include "ash/pointer_watcher_delegate_aura.h"
+#include "ash/pointer_down_watcher_delegate_aura.h"
 #include "ash/shell.h"
 #include "ash/shell/context_menu.h"
 #include "ash/shell/example_factory.h"
@@ -243,9 +243,9 @@ ash::MediaDelegate* ShellDelegateImpl::CreateMediaDelegate() {
   return new MediaDelegateImpl;
 }
 
-std::unique_ptr<ash::PointerWatcherDelegate>
-ShellDelegateImpl::CreatePointerWatcherDelegate() {
-  return base::WrapUnique(new PointerWatcherDelegateAura);
+std::unique_ptr<ash::PointerDownWatcherDelegate>
+ShellDelegateImpl::CreatePointerDownWatcherDelegate() {
+  return base::WrapUnique(new PointerDownWatcherDelegateAura);
 }
 
 ui::MenuModel* ShellDelegateImpl::CreateContextMenu(WmShelf* wm_shelf,