Web MIDI: remove old Windows backend

media/midi/dynamically_initialized_midi_manager_win.cc

 // 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.
 
 #include "media/midi/dynamically_initialized_midi_manager_win.h"
 
 #include <windows.h>
 
 #include <ks.h>
 #include <ksmedia.h>
 #include <mmreg.h>
 #include <mmsystem.h>
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
+#include "base/win/windows_version.h"
 #include "device/usb/usb_ids.h"
 #include "media/midi/message_util.h"
+#include "media/midi/midi_manager_winrt.h"
 #include "media/midi/midi_port_info.h"
 #include "media/midi/midi_service.h"
+#include "media/midi/midi_switches.h"
 
 namespace midi {
 
 // Forward declaration of PortManager for anonymous functions and internal
 // classes to use it.
 class DynamicallyInitializedMidiManagerWin::PortManager {
  public:
   // Calculates event time from elapsed time that system provides.
   base::TimeTicks CalculateInEventTime(size_t index, uint32_t elapsed_ms) const;
 
@@ skipping 806 matching lines @@
     uint32_t port_index,
     const std::vector<uint8_t>& data) {
   CHECK_GT(port_manager_->outputs()->size(), port_index);
   (*port_manager_->outputs())[port_index]->Send(data);
   // |client| will be checked inside MidiManager::AccumulateMidiBytesSent.
   PostReplyTask(
       base::Bind(&DynamicallyInitializedMidiManagerWin::AccumulateMidiBytesSent,
                  base::Unretained(this), client, data.size()));
 }
 
+MidiManager* MidiManager::Create(MidiService* service) {
+  if (base::FeatureList::IsEnabled(features::kMidiManagerWinrt) &&
+      base::win::GetVersion() >= base::win::VERSION_WIN10)
+    return new MidiManagerWinrt(service);
+  return new DynamicallyInitializedMidiManagerWin(service);
+}
+
 }  // namespace midi