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

ash/common/wm_shell.h

Index: ash/common/wm_shell.h
diff --git a/ash/common/wm_shell.h b/ash/common/wm_shell.h
index 28016113b8e0b20a84a0dce6476de25fe38dc3a7..ec0b0941dc926b8a8b0381185bf70e0ff94f24de 100644
--- a/ash/common/wm_shell.h
+++ b/ash/common/wm_shell.h
@@ -17,7 +17,7 @@
 #include "base/observer_list.h"
 
 namespace views {
-class PointerDownWatcher;
+class PointerWatcher;
 }
 
 namespace ash {
@@ -250,8 +250,8 @@ class ASH_EXPORT WmShell {
   void AddShellObserver(ShellObserver* observer);
   void RemoveShellObserver(ShellObserver* observer);
 
-  virtual void AddPointerDownWatcher(views::PointerDownWatcher* watcher) = 0;
-  virtual void RemovePointerDownWatcher(views::PointerDownWatcher* watcher) = 0;
+  virtual void AddPointerWatcher(views::PointerWatcher* watcher) = 0;
+  virtual void RemovePointerWatcher(views::PointerWatcher* watcher) = 0;
 
   // TODO: Move these back to LockStateController when that has been moved.
   void OnLockStateEvent(LockStateObserver::EventType event);