Decouple MIDIAccess initialization from MIDIAccess class.

Source/modules/webmidi/MIDIController.cpp

Index: Source/modules/webmidi/MIDIController.cpp
diff --git a/Source/modules/webmidi/MIDIController.cpp b/Source/modules/webmidi/MIDIController.cpp
index c25bd6999b5ef0b4033cda968fa5f95a12d18a30..d5fb4cd929de2aa13287cec5d06b8319f77313b8 100644
--- a/Source/modules/webmidi/MIDIController.cpp
+++ b/Source/modules/webmidi/MIDIController.cpp
@@ -31,7 +31,7 @@
 #include "config.h"
 #include "modules/webmidi/MIDIController.h"
 
-#include "modules/webmidi/MIDIAccess.h"
+#include "modules/webmidi/MIDIAccessInitializer.h"
 #include "modules/webmidi/MIDIClient.h"
 
 namespace WebCore {
@@ -56,14 +56,14 @@ PassOwnPtrWillBeRawPtr<MIDIController> MIDIController::create(PassOwnPtr<MIDICli
     return adoptPtrWillBeNoop(new MIDIController(client));
 }
 
-void MIDIController::requestSysexPermission(PassRefPtrWillBeRawPtr<MIDIAccess> access)
+void MIDIController::requestSysexPermission(MIDIAccessInitializer* initializer)
 {
-    m_client->requestSysexPermission(access);
+    m_client->requestSysexPermission(initializer);
 }
 
-void MIDIController::cancelSysexPermissionRequest(MIDIAccess* access)
+void MIDIController::cancelSysexPermissionRequest(MIDIAccessInitializer* initializer)
 {
-    m_client->cancelSysexPermissionRequest(access);
+    m_client->cancelSysexPermissionRequest(initializer);
 }
 
 void provideMIDITo(Page& page, PassOwnPtr<MIDIClient> client)