Web MIDI: implement sending for dynamic manager instantiation on Windows

media/midi/dynamically_initialized_midi_manager_win.h

 // Copyright 2017 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_DYNAMICALLY_INITIALIZED_MIDI_MANAGER_WIN_H_
 #define MEDIA_MIDI_DYNAMICALLY_INITIALIZED_MIDI_MANAGER_WIN_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/system_monitor/system_monitor.h"
 #include "media/midi/midi_manager.h"
 
 namespace base {
 class SingleThreadTaskRunner;
+class TimeDelta;
 }  // namespace base
 
 namespace midi {
 
 // New backend for legacy Windows that support dynamic instantiation.
 class DynamicallyInitializedMidiManagerWin final
     : public MidiManager,
       public base::SystemMonitor::DevicesChangedObserver {
  public:
   class PortManager;
@@ skipping 21 matching lines @@
   class OutPort;
 
   // Handles MIDI inport event posted from a thread system provides.
   void ReceiveMidiData(uint32_t index,
                        const std::vector<uint8_t>& data,
                        base::TimeTicks time);
 
   // Posts a task to TaskRunner, and ensures that the instance keeps alive while
   // the task is running.
   void PostTask(const base::Closure&);
+  void PostDelayedTask(const base::Closure&, base::TimeDelta delay);
 
   // Posts a reply task to the I/O thread that hosts MidiManager instance, runs
   // it safely, and ensures that the instance keeps alive while the task is
   // running.
   void PostReplyTask(const base::Closure&);
 
   // Initializes instance asynchronously on TaskRunner.
   void InitializeOnTaskRunner();
 
   // Updates device lists on TaskRunner.
   // Returns true if device lists were changed.
   void UpdateDeviceListOnTaskRunner();
 
   // Reflect active port list to a device list.
   template <typename T>
   void ReflectActiveDeviceList(DynamicallyInitializedMidiManagerWin* manager,
                                std::vector<T>* known_ports,
                                std::vector<T>* active_ports);
 
+  // Sends MIDI data on TaskRunner.
+  void SendOnTaskRunner(MidiManagerClient* client,
+                        uint32_t port_index,
+                        const std::vector<uint8_t>& data);
+
   // Holds an unique instance ID.
   const int instance_id_;
 
   // Keeps a TaskRunner for the I/O thread.
   scoped_refptr<base::SingleThreadTaskRunner> thread_runner_;
 
   // Manages platform dependent implementation for port managegent. Should be
   // accessed with the task lock.
   std::unique_ptr<PortManager> port_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DynamicallyInitializedMidiManagerWin);
 };
 
 }  // namespace midi
 
 #endif  // MEDIA_MIDI_DYNAMICALLY_INITIALIZED_MIDI_MANAGER_WIN_H_