Bug 936964 (part 3, attempt 2) - Make nsCycleCollector ref-counted. r=mccr8.

// Top level structure for the cycle collector.

////////////////////////////////////////////////////////////////////////

class nsCycleCollector

class nsCycleCollector : public nsISupports

{

    NS_DECL_ISUPPORTS

    bool mCollectionInProgress;

    // mScanInProgress should be false when we're collecting white objects.

    bool mScanInProgress;

public:

    nsCycleCollector();

    ~nsCycleCollector();

    virtual ~nsCycleCollector();

    void RegisterJSRuntime(CycleCollectedJSRuntime *aJSRuntime);

    void ForgetJSRuntime();

    void CleanupAfterCollection();

};

NS_IMPL_ISUPPORTS1(nsCycleCollector, nsISupports)

/**

 * GraphWalker is templatized over a Visitor class that must provide

 * the following two methods:

////////////////////////////////////////////////////////////////////////

struct CollectorData {

  nsCycleCollector* mCollector;

  nsRefPtr<nsCycleCollector> mCollector;

  CycleCollectedJSRuntime* mRuntime;

};

        MOZ_CRASH();

    }

    nsAutoPtr<nsCycleCollector> collector(new nsCycleCollector());

    nsAutoPtr<CollectorData> data(new CollectorData);

    CollectorData* data = new CollectorData;

    data->mCollector = new nsCycleCollector();

    data->mRuntime = nullptr;

    data->mCollector = collector.forget();

    sCollectorData.set(data.forget());

    sCollectorData.set(data);

}

void

        MOZ_ASSERT(data->mCollector);

        PROFILER_LABEL("CC", "nsCycleCollector_shutdown");

        data->mCollector->Shutdown();

        delete data->mCollector;

        data->mCollector = nullptr;

        if (!data->mRuntime) {

          delete data;