Web MIDI: clean up on MIDIPort and MIDIErrorCallback

Source/modules/webmidi/MIDIErrorCallback.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 11 matching lines @@
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
-
 #include "modules/webmidi/MIDIErrorCallback.h"
 
 #include "core/dom/DOMError.h"
 #include "core/dom/ScriptExecutionContext.h"
 
 namespace WebCore {
 
 namespace {
 
 class DispatchCallbackTask : public ScriptExecutionContext::Task {
@@ skipping 20 matching lines @@
 };
 
 } // namespace
 
 void MIDIErrorCallback::scheduleCallback(ScriptExecutionContext* context, PassRefPtr<DOMError> error)
 {
     context->postTask(DispatchCallbackTask::create(this, error));
 }
 
 } // namespace WebCore