Debugger: prepare code for debugging on a per-function basis.

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 38008c3f19dae7c9b804e7837ff8f8a6058b17f0..c34d12c0f2d92d107083135ebb15a5944eb36a42 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -4357,10 +4357,7 @@ void MarkCompactCollector::ParallelSweepSpacesComplete() {
 
 
 void MarkCompactCollector::EnableCodeFlushing(bool enable) {
-  if (isolate()->debug()->is_loaded() ||
-      isolate()->debug()->has_break_points()) {
-    enable = false;
-  }
+  if (isolate()->debug()->is_active()) enable = false;
 
   if (enable) {
     if (code_flusher_ != NULL) return;