Disable the profiler when a debugger is attached

runtime/vm/thread_interrupter_win.cc

Index: runtime/vm/thread_interrupter_win.cc
diff --git a/runtime/vm/thread_interrupter_win.cc b/runtime/vm/thread_interrupter_win.cc
index bcbcc778b7a135f4cbedbda0725e623c0f693c81..b181ba773a94a1d5eb5e82f62e827d4aaa6a2c77 100644
--- a/runtime/vm/thread_interrupter_win.cc
+++ b/runtime/vm/thread_interrupter_win.cc
@@ -93,6 +93,11 @@ class ThreadInterrupterWin : public AllStatic {
 };
 
 
+bool ThreadInterrupter::IsDebuggerAttached() {
+  return false;
+}
+
+
 void ThreadInterrupter::InterruptThread(OSThread* thread) {
   if (FLAG_trace_thread_interrupter) {
     OS::Print("ThreadInterrupter suspending %p\n",