[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/webmidi/MIDIAccess.h

 /*
  * 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 14 matching lines @@
  * 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.
  */
 
 #ifndef MIDIAccess_h
 #define MIDIAccess_h
 
 #include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/V8GCRoot.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "modules/EventTargetModules.h"
 #include "modules/webmidi/MIDIAccessInitializer.h"
 #include "modules/webmidi/MIDIAccessor.h"
 #include "modules/webmidi/MIDIAccessorClient.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class ExecutionContext;
 class MIDIInput;
 class MIDIInputMap;
 class MIDIOutput;
 class MIDIOutputMap;
 
-class MIDIAccess final : public RefCountedGarbageCollectedEventTargetWithInlineData<MIDIAccess>, public ActiveDOMObject, public MIDIAccessorClient {
+class MIDIAccess final : public RefCountedGarbageCollectedEventTargetWithInlineData<MIDIAccess>, public ActiveDOMObject, public MIDIAccessorClient, public V8GCRoot {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MIDIAccess);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
 public:
     static MIDIAccess* create(PassOwnPtr<MIDIAccessor> accessor, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>& ports, ExecutionContext* executionContext)
     {
         MIDIAccess* access = new MIDIAccess(accessor, sysexEnabled, ports, executionContext);
         access->suspendIfNeeded();
         return access;
     }
@@ skipping 43 matching lines @@
     OwnPtr<MIDIAccessor> m_accessor;
     bool m_sysexEnabled;
     bool m_hasPendingActivity;
     HeapVector<Member<MIDIInput>> m_inputs;
     HeapVector<Member<MIDIOutput>> m_outputs;
 };
 
 } // namespace blink
 
 #endif // MIDIAccess_h