Web MIDI: blink API update to support MIDIPortState

public/platform/WebMIDIAccessorClient.h

Index: public/platform/WebMIDIAccessorClient.h
diff --git a/public/platform/WebMIDIAccessorClient.h b/public/platform/WebMIDIAccessorClient.h
index 04082f0f7d2a382eea47907128df597dac3ebbc3..08efc5e953073d71c7083be80085ded720166b71 100644
--- a/public/platform/WebMIDIAccessorClient.h
+++ b/public/platform/WebMIDIAccessorClient.h
@@ -37,14 +37,26 @@ namespace blink {
 
 class WebMIDIAccessorClient {
 public:
+    enum MIDIPortState {
+        MIDIPortStateDisconnected,
+        MIDIPortStateConnected,
+        MIDIPortStateOpened,
+    };
+
     // didAddInputPort() and didAddOutputPort() can be called before and after
     // didStartSession() is called. But |id| should be unique in each function.
+    // FIXME: Remove obsolete interfaces that use isActive.
     virtual void didAddInputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version, bool isActive) = 0;
     virtual void didAddOutputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version, bool isActive) = 0;
+    virtual void didAddInputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version, MIDIPortState) = 0;
+    virtual void didAddOutputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version, MIDIPortState) = 0;
     // didSetInputPortState() and didSetOutputPortState() should not be called
     // until didStartSession() is called.
+    // FIXME: Remove obsolete interfaces that use isActive.
     virtual void didSetInputPortState(unsigned portIndex, bool isActive) = 0;
     virtual void didSetOutputPortState(unsigned portIndex, bool isActive) = 0;
+    virtual void didSetInputPortState(unsigned portIndex, MIDIPortState) = 0;
+    virtual void didSetOutputPortState(unsigned portIndex, MIDIPortState) = 0;
 
     virtual void didStartSession(bool success, const WebString& error, const WebString& message) = 0;