[not for review] Web MIDI: new backend to support dynamic instantiation on Windows

media/midi/midi_manager_win.cc

 // Copyright 2013 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/midi_manager_win.h"
 
 #include <windows.h>
 #include <ks.h>
 #include <ksmedia.h>
 #include <mmreg.h>
@@ skipping 25 matching lines @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/thread_checker.h"
 #include "base/timer/timer.h"
 #include "base/win/message_window.h"
 #include "base/win/windows_version.h"
 #include "device/usb/usb_ids.h"
+#include "media/midi/dynamically_initialized_midi_manager_win.h"
 #include "media/midi/message_util.h"
 #include "media/midi/midi_manager_winrt.h"
 #include "media/midi/midi_message_queue.h"
 #include "media/midi/midi_port_info.h"
 #include "media/midi/midi_switches.h"
 
 namespace midi {
 namespace {
 
 using mojom::PortState;
@@ skipping 1140 matching lines @@
 void MidiManagerWin::OnReceiveMidiData(uint32_t port_index,
                                        const std::vector<uint8_t>& data,
                                        base::TimeTicks time) {
   ReceiveMidiData(port_index, &data[0], data.size(), time);
 }
 
 MidiManager* MidiManager::Create(MidiService* service) {
   if (base::FeatureList::IsEnabled(features::kMidiManagerWinrt) &&
       base::win::GetVersion() >= base::win::VERSION_WIN10)
     return new MidiManagerWinrt(service);
+  if (base::FeatureList::IsEnabled(features::kMidiManagerDynamicInstantiation))
+    return new DynamicallyInitializedMidiManagerWin(service);
   return new MidiManagerWin(service);
 }
 
 }  // namespace midi