[WebMIDI] [Android] Set appropriate port properties.

media/midi/usb_midi_device_android.h

 // 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.
 
 #ifndef MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_
 #define MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_
 
 #include <jni.h>
+#include <string>
 #include <vector>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "media/base/media_export.h"
 #include "media/midi/usb_midi_device.h"
 
 namespace media {
 
 class MEDIA_EXPORT UsbMidiDeviceAndroid : public UsbMidiDevice {
  public:
   typedef base::android::ScopedJavaLocalRef<jobject> ObjectRef;
 
   static scoped_ptr<Factory> CreateFactory();
 
   UsbMidiDeviceAndroid(ObjectRef raw_device, UsbMidiDeviceDelegate* delegate);
   ~UsbMidiDeviceAndroid() override;
 
   // UsbMidiDevice implementation.
-  std::vector<uint8> GetDescriptor() override;
+  std::vector<uint8> GetDescriptors() override;
+  std::string GetManufacturer() override;
+  std::string GetProductName() override;
+  std::string GetDeviceVersion() override;
   void Send(int endpoint_number, const std::vector<uint8>& data) override;
 
   // Called by the Java world.
   void OnData(JNIEnv* env,
               jobject caller,
               jint endpoint_number,
               jbyteArray data);
 
   static bool RegisterUsbMidiDevice(JNIEnv* env);
 
  private:
+  void GetDescriptorsInternal();
+  void InitDeviceInfo();
+  std::vector<uint8> GetStringDescriptor(int index);
+  std::string GetString(int index, const std::string& backup);
+
   // The actual device object.
   base::android::ScopedJavaGlobalRef<jobject> raw_device_;
   UsbMidiDeviceDelegate* delegate_;
 
+  std::vector<uint8> descriptors_;
+  std::string manufacturer_;
+  std::string product_;
+  std::string device_version_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(UsbMidiDeviceAndroid);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MIDI_USB_MIDI_DEVICE_ANDROID_H_