Change the Thread constructor over to take a Process& rather than a ProcessSP. We can't create Threads with a NULL ProcessSP, so it makes no sense to use the SP.

Then make the Thread a Broadcaster, and get it to broadcast when the selected frame is changed (but only from the Command Line) and when Thread::ReturnFromFrame 
changes the stack.
Made the Driver use this notification to print the new thread status rather than doing it in the command.
Fixed a few places where people were setting their broadcaster class by hand rather than using the static broadcaster class call.

<rdar://problem/12383087>

llvm-svn: 165640

lldb/source/Plugins/OperatingSystem/Python/OperatingSystemPython.cpp

@@ -188,7 +188,7 @@ OperatingSystemPython::UpdateThreadList (ThreadList &old_thread_list, ThreadList
                 
                 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false));
                 if (!thread_sp)
-                    thread_sp.reset (new ThreadMemory (m_process->shared_from_this(),
+                    thread_sp.reset (new ThreadMemory (*m_process,
                                                        tid,
                                                        name,
                                                        queue));