Remove PPB_Ext_Alarms_Dev and PPB_Ext_Events_Dev.

ppapi/cpp/extensions/dev/events_dev.h

-// Copyright (c) 2013 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 PPAPI_CPP_EXTENSIONS_DEV_EVENTS_DEV_H_
-#define PPAPI_CPP_EXTENSIONS_DEV_EVENTS_DEV_H_
-
-#include "ppapi/c/pp_instance.h"
-#include "ppapi/c/pp_stdint.h"
-
-struct PP_Ext_EventListener;
-
-namespace pp {
-namespace ext {
-namespace events {
-
-// This is a simple wrapper of the PPB_Ext_Events_Dev interface.
-//
-// Usually you don't have to directly use this interface. Instead, you could
-// use those more object-oriented event classes. Please see
-// ppapi/cpp/extensions/event_base.h for more details.
-class Events_Dev {
- public:
-  static uint32_t AddListener(PP_Instance instance,
-                              const PP_Ext_EventListener& listener);
-
-  static void RemoveListener(PP_Instance instance, uint32_t listener_id);
-};
-
-}  // namespace events
-}  // namespace ext
-}  // namespace pp
-
-#endif  // PPAPI_CPP_EXTENSIONS_DEV_EVENTS_DEV_H_