Web MIDI: introduce WebMIDIClient API to request a permission

Source/core/platform/midi/MIDIAccessor.cpp

Index: Source/core/platform/midi/MIDIAccessor.cpp
diff --git a/Source/core/platform/midi/MIDIAccessor.cpp b/Source/core/platform/midi/MIDIAccessor.cpp
index a5f602b6a87174f931d0c45a4d1ce9c3834cbb06..bad66f980e0be96550d9cfdfd09f25b87edb2d88 100644
--- a/Source/core/platform/midi/MIDIAccessor.cpp
+++ b/Source/core/platform/midi/MIDIAccessor.cpp
@@ -34,8 +34,11 @@
 #include "core/platform/midi/MIDIAccessorClient.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebMIDIAccessor.h"
+#include "public/web/WebSecurityOrigin.h"
+#include "weborigin/SecurityOrigin.h"
 #include "wtf/text/WTFString.h"
 
+using WebKit::WebSecurityOrigin;
 using WebKit::WebString;
 
 namespace WebCore {
@@ -66,6 +69,11 @@ void MIDIAccessor::sendMIDIData(unsigned portIndex, const unsigned char* data, s
     m_accessor->sendMIDIData(portIndex, data, length, timeStamp);
 }
 
+WebSecurityOrigin MIDIAccessor::securityOrigin() const
+{
+    return WebSecurityOrigin(m_client->securityOrigin());
+}
+
 void MIDIAccessor::didAddInputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version)
 {
     m_client->didAddInputPort(id, manufacturer, name, version);