MediaStreamSource: verify unlocked state when finalizing.

third_party/WebKit/Source/platform/mediastream/MediaStreamSource.h

 /*
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  * Copyright (C) 2012 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 57 matching lines @@
     ReadyStateEnded = 2
   };
 
   static MediaStreamSource* create(const String& id,
                                    StreamType,
                                    const String& name,
                                    bool remote,
                                    ReadyState = ReadyStateLive,
                                    bool requiresConsumer = false);
 
+  ~MediaStreamSource();
+
   const String& id() const { return m_id; }
   StreamType type() const { return m_type; }
   const String& name() const { return m_name; }
   bool remote() const { return m_remote; }
 
   void setReadyState(ReadyState);
   ReadyState getReadyState() const { return m_readyState; }
 
   void addObserver(Observer*);
 
@@ skipping 43 matching lines @@
   HeapHashSet<Member<AudioDestinationConsumer>> m_audioConsumers;
   std::unique_ptr<ExtraData> m_extraData;
   WebMediaConstraints m_constraints;
 };
 
 typedef HeapVector<Member<MediaStreamSource>> MediaStreamSourceVector;
 
 }  // namespace blink
 
 #endif  // MediaStreamSource_h