Port count-based profiler to ARM

src/isolate-inl.h

Index: src/isolate-inl.h
diff --git a/src/isolate-inl.h b/src/isolate-inl.h
index 0a2c17404e63f20e97be4507b033aa2f49a0425f..9fb16fbe96d90066a8b9fee8f7af334ec760b7c9 100644
--- a/src/isolate-inl.h
+++ b/src/isolate-inl.h
@@ -49,6 +49,16 @@ SaveContext::SaveContext(Isolate* isolate) : prev_(isolate->save_context()) {
 }
 
 
+bool Isolate::IsDebuggerActive() {
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  if (!NoBarrier_Load(&debugger_initialized_)) return false;
+  return debugger()->IsDebuggerActive();
+#else
+  return false;
+#endif
+}
+
+
 bool Isolate::DebuggerHasBreakPoints() {
 #ifdef ENABLE_DEBUGGER_SUPPORT
   return debug()->has_break_points();