Free slots buffer entries when tearing down the heap.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/21216003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15973 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -6945,6 +6945,8 @@ void Heap::TearDown() {
 
   external_string_table_.TearDown();
 
+  mark_compact_collector()->TearDown();
+
   new_space_.TearDown();
 
   if (old_pointer_space_ != NULL) {

src/mark-compact.cc

@@ -337,6 +337,11 @@ static void VerifyNativeContextSeparation(Heap* heap) {
 #endif
 
 
+void MarkCompactCollector::TearDown() {
+  AbortCompaction();
+}
+
+
 void MarkCompactCollector::AddEvacuationCandidate(Page* p) {
   p->MarkEvacuationCandidate();
   evacuation_candidates_.Add(p);

src/mark-compact.h

@@ -571,6 +571,8 @@ class MarkCompactCollector {
 
   static void Initialize();
 
+  void TearDown();
+
   void CollectEvacuationCandidates(PagedSpace* space);
 
   void AddEvacuationCandidate(Page* p);