Remove profiler signal handler on shutdown

runtime/vm/thread_interrupter.cc

Index: runtime/vm/thread_interrupter.cc
diff --git a/runtime/vm/thread_interrupter.cc b/runtime/vm/thread_interrupter.cc
index b2f5f1c647dc95cb3c03b65f78292f00e478916a..10cff89a4663c002e888de443b3bb765ac4c9686 100644
--- a/runtime/vm/thread_interrupter.cc
+++ b/runtime/vm/thread_interrupter.cc
@@ -314,6 +314,7 @@ void ThreadInterrupter::ThreadMain(uword parameters) {
       ASSERT(current_wait_time_ != Monitor::kNoTimeout);
     }
   }
+  RemoveSignalHandler();

[siva, 2015/04/07 18:18:07]

Instead of a per OS RemoveSignalHandler() implementation why not just call
SignalHandler::Remove() here?

[Cutch, 2015/04/07 18:35:55]

SignalHandler::Remove() on Windows is UNREACHABLE().

   if (FLAG_trace_thread_interrupter) {
     OS::Print("ThreadInterrupter thread exiting.\n");
   }