Merge "Doc Thread requirement." am: c545516e

{

public:

    // Create a Thread object, but doesn't create or start the associated

    // thread. See the run() method.

    // thread. See the run() method. This object must be used with RefBase/sp,

    // like any other RefBase object, because they are conventionally promoted

    // from bare pointers (Thread::run is particularly problematic here).

    explicit            Thread(bool canCallJava = true);

    virtual             ~Thread();