Take freed handles into account when scheduling idle GCs.

src/heap/gc-idle-time-handler.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/gc-idle-time-handler.h"
 #include "src/heap/gc-tracer.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 381 matching lines @@
         return kReduceLatency;
       }
       break;
     case kReduceLatency:
       if (IsMutatorIdle(long_idle_notifications_,
                         background_idle_notifications_, mutator_gcs)) {
         return kReduceMemory;
       }
       break;
     case kReduceMemory:
-      if (idle_mark_compacts_ >= kMaxIdleMarkCompacts) {
+      if (idle_mark_compacts_ >= kMaxIdleMarkCompacts ||
+          (idle_mark_compacts_ > 0 && !next_gc_likely_to_collect_more_)) {
         return kDone;
       }
       if (mutator_gcs > idle_mark_compacts_) {
         return kReduceLatency;
       }
       break;
   }
   return mode_;
 }
 }
 }