Replace deprecated base::NonThreadSafe in ipc in favor of SequenceChecker.

ipc/ipc_channel_proxy.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 IPC_IPC_CHANNEL_PROXY_H_
 #define IPC_IPC_CHANNEL_PROXY_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "base/sequence_checker.h"
 #include "base/synchronization/lock.h"
-#include "base/threading/non_thread_safe.h"
 #include "build/build_config.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "mojo/public/cpp/bindings/associated_interface_ptr.h"
 #include "mojo/public/cpp/bindings/associated_interface_request.h"
 #include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
 #include "mojo/public/cpp/bindings/thread_safe_interface_ptr.h"
 
@@ skipping 36 matching lines @@
 // instance where the IPC::Channel will be created and operated.
 //
 // Thread-safe send
 //
 // If a particular |Channel| implementation has a thread-safe |Send()| operation
 // then ChannelProxy skips the inter-thread hop and calls |Send()| directly. In
 // this case the |channel_| variable is touched by multiple threads so
 // |channel_lifetime_lock_| is used to protect it. The locking overhead is only
 // paid if the underlying channel supports thread-safe |Send|.
 //
-class IPC_EXPORT ChannelProxy : public Sender, public base::NonThreadSafe {
+class IPC_EXPORT ChannelProxy : public Sender {
  public:
 #if defined(ENABLE_IPC_FUZZER)
   // Interface for a filter to be imposed on outgoing messages which can
   // re-write the message. Used for testing.
   class OutgoingMessageFilter {
    public:
     virtual Message* Rewrite(Message* message) = 0;
   };
 #endif
 
@@ skipping 311 matching lines @@
   // can safely be destroyed while the background thread continues to do stuff
   // that involves this data.
   scoped_refptr<Context> context_;
 
   // Whether the channel has been initialized.
   bool did_init_;
 
 #if defined(ENABLE_IPC_FUZZER)
   OutgoingMessageFilter* outgoing_message_filter_;
 #endif
+
+  SEQUENCE_CHECKER(sequence_checker_);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H_