Web MIDI: introduce WebMIDIClient API to request a permission

Source/modules/webmidi/MIDIAccess.cpp

Index: Source/modules/webmidi/MIDIAccess.cpp
diff --git a/Source/modules/webmidi/MIDIAccess.cpp b/Source/modules/webmidi/MIDIAccess.cpp
index 7960055e54e96f766db9b67c15ecd9160b2b7bce..d62c2e335bba161c3625801bd792c79f6ef1ebd7 100644
--- a/Source/modules/webmidi/MIDIAccess.cpp
+++ b/Source/modules/webmidi/MIDIAccess.cpp
@@ -33,11 +33,13 @@
 
 #include "core/dom/DOMError.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/ScriptExecutionContext.h"
 #include "modules/webmidi/MIDIAccessPromise.h"
 #include "modules/webmidi/MIDIConnectionEvent.h"
 #include "modules/webmidi/MIDIInput.h"
 #include "modules/webmidi/MIDIOutput.h"
 #include "modules/webmidi/MIDIPort.h"
+#include "weborigin/SecurityOrigin.h"
 
 namespace WebCore {
 
@@ -60,7 +62,7 @@ MIDIAccess::MIDIAccess(ScriptExecutionContext* context, MIDIAccessPromise* promi
 {
     ScriptWrappable::init(this);
     m_accessor = MIDIAccessor::create(this);
-    m_accessor->requestAccess(promise->options()->sysexEnabled);
+    m_accessor->requestAccess(context->securityOrigin()->toString(), promise->options()->sysexEnabled);
 }
 
 void MIDIAccess::didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version)