Remove GTalk Pepper interfaces and related code.

ppapi/proxy/talk_resource.h

-// Copyright (c) 2012 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_PROXY_TALK_RESOURCE_H_
-#define PPAPI_PROXY_TALK_RESOURCE_H_
-
-#include "ppapi/proxy/plugin_resource.h"
-#include "ppapi/proxy/ppapi_proxy_export.h"
-#include "ppapi/shared_impl/tracked_callback.h"
-#include "ppapi/thunk/ppb_talk_private_api.h"
-
-namespace ppapi {
-namespace proxy {
-
-class PPAPI_PROXY_EXPORT TalkResource
-    : public PluginResource,
-      public NON_EXPORTED_BASE(thunk::PPB_Talk_Private_API) {
- public:
-  TalkResource(Connection connection, PP_Instance instance);
-  ~TalkResource() override;
-
-  // Resource overrides.
-  thunk::PPB_Talk_Private_API* AsPPB_Talk_Private_API() override;
-
- private:
-  // PPB_Talk_API implementation.
-  int32_t RequestPermission(PP_TalkPermission permission,
-                            scoped_refptr<TrackedCallback> callback) override;
-  int32_t StartRemoting(PP_TalkEventCallback event_callback,
-                        void* user_data,
-                        scoped_refptr<TrackedCallback> callback) override;
-  int32_t StopRemoting(scoped_refptr<TrackedCallback> callback) override;
-
-  // PluginResource override.
-  void OnReplyReceived(const ResourceMessageReplyParams& params,
-                       const IPC::Message& msg) override;
-
-  void OnNotifyEvent(const ResourceMessageReplyParams& params,
-                     PP_TalkEvent event);
-  void OnRequestPermissionReply(const ResourceMessageReplyParams& params);
-  void OnStartRemotingReply(const ResourceMessageReplyParams& params);
-  void OnStopRemotingReply(const ResourceMessageReplyParams& params);
-
-  scoped_refptr<TrackedCallback> permission_callback_;
-  scoped_refptr<TrackedCallback> start_callback_;
-  scoped_refptr<TrackedCallback> stop_callback_;
-  PP_TalkEventCallback event_callback_;
-  void* event_callback_user_data_;
-
-  DISALLOW_COPY_AND_ASSIGN(TalkResource);
-};
-
-}  // namespace proxy
-}  // namespace ppapi
-
-#endif  // PPAPI_PROXY_TALK_RESOURCE_H_