Replace scoped_ptr with std::unique_ptr in //media.

media/midi/usb_midi_device_android.h

Index: media/midi/usb_midi_device_android.h
diff --git a/media/midi/usb_midi_device_android.h b/media/midi/usb_midi_device_android.h
index 58f45b39c0524ef42c2a363f507a42cf25f66c30..1c5e696821f76ad4846c182891878c7c11b31d8f 100644
--- a/media/midi/usb_midi_device_android.h
+++ b/media/midi/usb_midi_device_android.h
@@ -7,6 +7,7 @@
 
 #include <jni.h>
 #include <stdint.h>
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -21,7 +22,7 @@ namespace midi {
 
 class USB_MIDI_EXPORT UsbMidiDeviceAndroid : public UsbMidiDevice {
  public:
-  static scoped_ptr<Factory> CreateFactory();
+  static std::unique_ptr<Factory> CreateFactory();
 
   UsbMidiDeviceAndroid(const base::android::JavaRef<jobject>& raw_device,
                        UsbMidiDeviceDelegate* delegate);