Reset opt count on optimized code map lookup failure.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index ecd959da6716ee680e1c8307dc7594dfce8c2d46..a87cce2289fa90ce73055ca901cc170232b2b6fe 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -1150,8 +1150,6 @@ void Heap::MarkCompact(GCTracer* tracer) {
 
   isolate_->counters()->objs_since_last_full()->Set(0);
 
-  contexts_disposed_ = 0;
-
   flush_monomorphic_ics_ = false;
 }
 
@@ -5761,6 +5759,7 @@ bool Heap::IdleNotification(int hint) {
       size_factor * IncrementalMarking::kAllocatedThreshold;
 
   if (contexts_disposed_ > 0) {
+    contexts_disposed_ = 0;
     if (hint >= kMaxHint) {
       // The embedder is requesting a lot of GC work after context disposal,
       // we age inline caches so that they don't keep objects from
@@ -5775,8 +5774,8 @@ bool Heap::IdleNotification(int hint) {
                         "idle notification: contexts disposed");
     } else {
       AdvanceIdleIncrementalMarking(step_size);
-      contexts_disposed_ = 0;
     }
+
     // After context disposal there is likely a lot of garbage remaining, reset
     // the idle notification counters in order to trigger more incremental GCs
     // on subsequent idle notifications.