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..a724f2b361956d2e028bcf21fb190dfffd73180d 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -4357,11 +4357,6 @@ void MarkCompactCollector::ParallelSweepSpacesComplete() {
 
 
 void MarkCompactCollector::EnableCodeFlushing(bool enable) {
-  if (isolate()->debug()->is_loaded() ||
-      isolate()->debug()->has_break_points()) {
-    enable = false;
-  }
-
   if (enable) {
     if (code_flusher_ != NULL) return;
     code_flusher_ = new CodeFlusher(isolate());