[Web MIDI] Use Android MIDI API.

media/midi/midi_output_port_android.cc

+// Copyright 2015 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_output_port_android.h"
+
+#include "base/android/jni_array.h"
+#include "jni/MidiOutputPortAndroid_jni.h"
+
+namespace media {
+namespace midi {
+
+MidiOutputPortAndroid::MidiOutputPortAndroid(JNIEnv* env, jobject raw)
+    : raw_port_(env, raw) {}
+MidiOutputPortAndroid::~MidiOutputPortAndroid() {}
+
+void MidiOutputPortAndroid::Send(const std::vector<uint8>& data) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  const uint8* head = data.size() ? &data[0] : nullptr;

[philburk, 2015/08/19 01:40:15]

If there is no data maybe skip the send call.

[yhirano, 2015/08/19 06:32:03]

Done.

+  ScopedJavaLocalRef<jbyteArray> data_to_pass =
+      base::android::ToJavaByteArray(env, head, data.size());
+
+  Java_MidiOutputPortAndroid_send(env, raw_port_.obj(), data_to_pass.obj());
+}
+
+bool MidiOutputPortAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace midi
+}  // namespace media