Web MIDI: add MidiScheduler for send() with timestamp

media/midi/midi_manager_usb.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 MEDIA_MIDI_MIDI_MANAGER_USB_H_
 #define MEDIA_MIDI_MIDI_MANAGER_USB_H_
 
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 #include "media/midi/midi_manager.h"
 #include "media/midi/usb_midi_device.h"
 #include "media/midi/usb_midi_input_stream.h"
 #include "media/midi/usb_midi_jack.h"
 #include "media/midi/usb_midi_output_stream.h"
 
 namespace media {
 
+class MidiScheduler;
+
 // MidiManager for USB-MIDI.
 class MEDIA_EXPORT MidiManagerUsb : public MidiManager,
                                     public UsbMidiDeviceDelegate,
                                     public UsbMidiInputStream::Delegate {
  public:
   explicit MidiManagerUsb(scoped_ptr<UsbMidiDevice::Factory> device_factory);
   ~MidiManagerUsb() override;
 
   // MidiManager implementation.
   void StartInitialization() override;
@@ skipping 38 matching lines @@
   scoped_ptr<UsbMidiDevice::Factory> device_factory_;
   ScopedVector<UsbMidiDevice> devices_;
   ScopedVector<UsbMidiOutputStream> output_streams_;
   scoped_ptr<UsbMidiInputStream> input_stream_;
 
   base::Callback<void(MidiResult result)> initialize_callback_;
 
   // A map from <endpoint_number, cable_number> to the index of input jacks.
   base::hash_map<std::pair<int, int>, size_t> input_jack_dictionary_;
 
+  scoped_ptr<MidiScheduler> scheduler_;
+
   DISALLOW_COPY_AND_ASSIGN(MidiManagerUsb);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MIDI_MIDI_MANAGER_USB_H_