Make incremental marking clear ICs.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index f9ea3e6faa07dea5a8a5c98a551eba5aee9b55cf..cf4c2f2521f624e1cf022292f6f89a9e94c7f0bf 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -64,7 +64,6 @@ MarkCompactCollector::MarkCompactCollector() :  // NOLINT
       abort_incremental_marking_(false),
       compacting_(false),
       was_marked_incrementally_(false),
-      flush_monomorphic_ics_(false),
       tracer_(NULL),
       migration_slots_buffer_(NULL),
       heap_(NULL),
@@ -768,12 +767,6 @@ void MarkCompactCollector::AbortCompaction() {
 void MarkCompactCollector::Prepare(GCTracer* tracer) {
   was_marked_incrementally_ = heap()->incremental_marking()->IsMarking();
 
-  // Monomorphic ICs are preserved when possible, but need to be flushed
-  // when they might be keeping a Context alive, or when the heap is about
-  // to be serialized.
-  flush_monomorphic_ics_ =
-      heap()->isolate()->context_exit_happened() || Serializer::enabled();
-
   // Rather than passing the tracer around we stash it in a static member
   // variable.
   tracer_ = tracer;
@@ -1078,20 +1071,6 @@ class MarkCompactMarkingVisitor
     heap->mark_compact_collector()->MarkObject(object, mark);
   }
 
-  static inline void VisitCodeTarget(Heap* heap, RelocInfo* rinfo) {
-    ASSERT(RelocInfo::IsCodeTarget(rinfo->rmode()));
-    Code* target = Code::GetCodeFromTargetAddress(rinfo->target_address());
-    if (FLAG_cleanup_code_caches_at_gc && target->is_inline_cache_stub()
-        && (target->ic_state() == MEGAMORPHIC ||
-            heap->mark_compact_collector()->flush_monomorphic_ics_ ||
-            target->ic_age() != heap->global_ic_age())) {
-      IC::Clear(rinfo->pc());
-      target = Code::GetCodeFromTargetAddress(rinfo->target_address());
-    }
-    heap->mark_compact_collector()->RecordRelocSlot(rinfo, target);
-    MarkObject(heap, target);
-  }
-
   // Mark object pointed to by p.
   INLINE(static void MarkObjectByPointer(MarkCompactCollector* collector,
                                          Object** anchor_slot,