Web MIDI: convert Android native API switch to a field trial

media/midi/midi_manager_android.cc

 // 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.
 
 #include "media/midi/midi_manager_android.h"
 
 #include "base/android/build_info.h"
 #include "base/android/context_utils.h"
-#include "base/command_line.h"
+#include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "jni/MidiManagerAndroid_jni.h"
 #include "media/midi/midi_device_android.h"
 #include "media/midi/midi_manager_usb.h"
 #include "media/midi/midi_output_port_android.h"
 #include "media/midi/midi_switches.h"
 #include "media/midi/usb_midi_device_factory_android.h"
 
 using base::android::JavaParamRef;
 using midi::mojom::PortState;
 using midi::mojom::Result;
 
 namespace midi {
 
 MidiManager* MidiManager::Create() {
   auto sdk_version = base::android::BuildInfo::GetInstance()->sdk_int();
   if (sdk_version <= base::android::SDK_VERSION_LOLLIPOP_MR1 ||
-      !base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseAndroidMidiApi)) {
+      !base::FeatureList::IsEnabled(features::kMidiManagerAndroid)) {
     return new MidiManagerUsb(std::unique_ptr<UsbMidiDevice::Factory>(
         new UsbMidiDeviceFactoryAndroid));
   }
 
   return new MidiManagerAndroid();
 }
 
 MidiManagerAndroid::MidiManagerAndroid() {}
 
 MidiManagerAndroid::~MidiManagerAndroid() {
@@ skipping 141 matching lines @@
                      device->GetDeviceVersion(), PortState::CONNECTED));
   }
   devices_.push_back(device.release());
 }
 
 bool MidiManagerAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace midi