Web MIDI: add open() and close() to MIDIPort

Source/modules/webmidi/MIDIAccessorClient.h

Index: Source/modules/webmidi/MIDIAccessorClient.h
diff --git a/Source/modules/webmidi/MIDIAccessorClient.h b/Source/modules/webmidi/MIDIAccessorClient.h
index 2f75573092bc89e37d0c4b7c952a6a9d0d8e81e7..960ca90e5ea8a6ca28156214e45531c8432657e2 100644
--- a/Source/modules/webmidi/MIDIAccessorClient.h
+++ b/Source/modules/webmidi/MIDIAccessorClient.h
@@ -31,16 +31,17 @@
 #ifndef MIDIAccessorClient_h
 #define MIDIAccessorClient_h
 
+#include "modules/webmidi/MIDIAccessor.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class MIDIAccessorClient {
 public:
-    virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version, bool isActive) = 0;
-    virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version, bool isActive) = 0;
-    virtual void didSetInputPortState(unsigned portIndex, bool isActive) = 0;
-    virtual void didSetOutputPortState(unsigned portIndex, bool isActive) = 0;
+    virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version, MIDIAccessor::MIDIPortState) = 0;
+    virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version, MIDIAccessor::MIDIPortState) = 0;
+    virtual void didSetInputPortState(unsigned portIndex, MIDIAccessor::MIDIPortState) = 0;
+    virtual void didSetOutputPortState(unsigned portIndex, MIDIAccessor::MIDIPortState) = 0;
 
     virtual void didStartSession(bool success, const String& error, const String& message) = 0;
     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) = 0;