Remove ForwardingMessageFilter.

ipc/ipc_forwarding_message_filter.h

Index: ipc/ipc_forwarding_message_filter.h
diff --git a/ipc/ipc_forwarding_message_filter.h b/ipc/ipc_forwarding_message_filter.h
deleted file mode 100644
index 75080840d2f3e994804775a7ab58fd6c9c349e10..0000000000000000000000000000000000000000
--- a/ipc/ipc_forwarding_message_filter.h
+++ /dev/null
@@ -1,70 +0,0 @@
-// 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 IPC_IPC_FORWARDING_MESSAGE_FILTER_H_
-#define IPC_IPC_FORWARDING_MESSAGE_FILTER_H_
-
-#include <map>
-#include <set>
-
-#include "base/bind.h"
-#include "base/callback_forward.h"
-#include "base/synchronization/lock.h"
-#include "base/task_runner.h"
-#include "ipc/message_filter.h"
-
-namespace IPC {
-
-// This class can be used to intercept routed messages and
-// deliver them to a different task runner than they would otherwise
-// be sent. Messages are filtered based on type. To route these messages,
-// add a MessageRouter to the handler.
-//
-// The user of this class implements ForwardingMessageFilter::Client,
-// which will receive the intercepted messages, on the specified target thread.
-class IPC_EXPORT ForwardingMessageFilter : public MessageFilter {
- public:
-
-  // The handler is invoked on the thread associated with
-  // |target_task_runner| with messages that were intercepted by this filter.
-  typedef base::Callback<void(const Message&)> Handler;
-
-  // This filter will intercept |message_ids_to_filter| and post
-  // them to the provided |target_task_runner|, where they will be given
-  // to |handler|.
-  //
-  // The caller must ensure that |handler| outlives the lifetime of the filter.
-  ForwardingMessageFilter(
-      const uint32* message_ids_to_filter,
-      size_t num_message_ids_to_filter,
-      base::TaskRunner* target_task_runner);
-
-  // Define the message routes to be filtered.
-  void AddRoute(int routing_id, const Handler& handler);
-  void RemoveRoute(int routing_id);
-
-  // MessageFilter methods:
-  bool OnMessageReceived(const Message& message) override;
-
- private:
-  ~ForwardingMessageFilter() override;
-
-  std::set<int> message_ids_to_filter_;
-
-  // The handler_ only gets Run on the thread corresponding to
-  // target_task_runner_.
-  scoped_refptr<base::TaskRunner> target_task_runner_;
-
-  // Protects access to routes_.
-  base::Lock handlers_lock_;
-
-  // Indicates the routing_ids for which messages should be filtered.
-  std::map<int, Handler> handlers_;
-
-  DISALLOW_COPY_AND_ASSIGN(ForwardingMessageFilter);
-};
-
-}  // namespace IPC
-
-#endif  // IPC_IPC_FORWARDING_MESSAGE_FILTER_H_