Convert all usages of mojo::ErrorHandler in //device/serial to callbacks.

device/serial/data_sink_receiver.h

 // Copyright 2014 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 DEVICE_SERIAL_DATA_SINK_RECEIVER_H_
 #define DEVICE_SERIAL_DATA_SINK_RECEIVER_H_
 
 #include <queue>
 
 #include "base/callback.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "device/serial/buffer.h"
 #include "device/serial/data_stream.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
 
 namespace device {
 
 class DataSinkReceiver : public base::RefCounted<DataSinkReceiver>,
-                         public serial::DataSink,
-                         public mojo::ErrorHandler {
+                         public serial::DataSink {
  public:
   typedef base::Callback<void(scoped_ptr<ReadOnlyBuffer>)> ReadyCallback;
   typedef base::Callback<void(int32_t error)> CancelCallback;
   typedef base::Callback<void()> ErrorCallback;
 
   // Constructs a DataSinkReceiver. Whenever the pipe is ready for reading, the
   // |ready_callback| will be called with the ReadOnlyBuffer to read.
   // |ready_callback| will not be called again until the previous ReadOnlyBuffer
   // is destroyed. If a connection error occurs, |error_callback| will be called
   // and the DataSinkReceiver will act as if ShutDown() had been called. If
@@ skipping 14 matching lines @@
   friend class base::RefCounted<DataSinkReceiver>;
 
   ~DataSinkReceiver() override;
 
   // mojo::InterfaceImpl<serial::DataSink> overrides.
   void Cancel(int32_t error) override;
   void OnData(mojo::Array<uint8_t> data,
               const mojo::Callback<void(uint32_t, int32_t)>& callback) override;
   void ClearError() override;
 
-  void OnConnectionError() override;
+  void OnConnectionError();
 
   // Dispatches data to |ready_callback_|.
   void RunReadyCallback();
 
   // Reports a successful read of |bytes_read|.
   void Done(uint32_t bytes_read);
 
   // Reports a partially successful or unsuccessful read of |bytes_read|
   // with an error of |error|.
   void DoneWithError(uint32_t bytes_read, int32_t error);
@@ skipping 33 matching lines @@
   bool shut_down_;
 
   base::WeakPtrFactory<DataSinkReceiver> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DataSinkReceiver);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_SERIAL_DATA_SINK_RECEIVER_H_