Take freed handles into account when scheduling idle GCs.

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

 // 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.
 
 #ifndef V8_HEAP_GC_IDLE_TIME_HANDLER_H_
 #define V8_HEAP_GC_IDLE_TIME_HANDLER_H_
 
 #include "src/globals.h"
 
 namespace v8 {
@@ skipping 179 matching lines @@
     size_t new_space_allocation_throughput_in_bytes_per_ms;
   };
 
   GCIdleTimeHandler()
       : idle_mark_compacts_(0),
         mark_compacts_(0),
         scavenges_(0),
         long_idle_notifications_(0),
         background_idle_notifications_(0),
         idle_times_which_made_no_progress_per_mode_(0),
+        next_gc_likely_to_collect_more_(false),
         mode_(kReduceLatency) {}
 
   GCIdleTimeAction Compute(double idle_time_in_ms, HeapState heap_state);
 
   void NotifyIdleMarkCompact() { ++idle_mark_compacts_; }
 
-  void NotifyMarkCompact() { ++mark_compacts_; }
+  void NotifyMarkCompact(bool next_gc_likely_to_collect_more) {
+    next_gc_likely_to_collect_more_ = next_gc_likely_to_collect_more;
+    ++mark_compacts_;
+  }
 
   void NotifyScavenge() { ++scavenges_; }
 
   static size_t EstimateMarkingStepSize(size_t idle_time_in_ms,
                                         size_t marking_speed_in_bytes_per_ms);
 
   static size_t EstimateMarkCompactTime(
       size_t size_of_objects, size_t mark_compact_speed_in_bytes_per_ms);
 
   static size_t EstimateFinalIncrementalMarkCompactTime(
@@ skipping 37 matching lines @@
   int scavenges_;
   // The number of long idle notifications with no GC happening
   // between the notifications.
   int long_idle_notifications_;
   // The number of background idle notifications with no GC happening
   // between the notifications.
   int background_idle_notifications_;
   // Idle notifications with no progress in the current mode.
   int idle_times_which_made_no_progress_per_mode_;
 
+  bool next_gc_likely_to_collect_more_;
+
   Mode mode_;
 
   DISALLOW_COPY_AND_ASSIGN(GCIdleTimeHandler);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_GC_IDLE_TIME_HANDLER_H_