Take into account freed global handles for heap growing.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index f28d17a9b68fab830756085901e3308d53db4896..b4b019ef50d5481c6255a64cd56a19c4f6eebbe5 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -1325,7 +1325,8 @@ bool Heap::PerformGarbageCollection(
     // Register the amount of external allocated memory.
     amount_of_external_allocated_memory_at_last_global_gc_ =
         amount_of_external_allocated_memory_;
-    SetOldGenerationAllocationLimit(old_gen_size, gc_speed, mutator_speed);
+    SetOldGenerationAllocationLimit(old_gen_size, gc_speed, mutator_speed,
+                                    freed_global_handles);
   } else if (HasLowYoungGenerationAllocationRate() &&
              old_generation_size_configured_) {
     DampenOldGenerationAllocationLimit(old_gen_size, gc_speed, mutator_speed);
@@ -5653,7 +5654,11 @@ intptr_t Heap::CalculateOldGenerationAllocationLimit(double factor,
 
 void Heap::SetOldGenerationAllocationLimit(intptr_t old_gen_size,
                                            double gc_speed,
-                                           double mutator_speed) {
+                                           double mutator_speed,
+                                           int freed_global_handles) {
+  const int kFreedGlobalHandlesThreshold = 700;

[ulan, 2015/07/30 13:58:32]

These numbers are from the old heap growing strategy. 

+  const double kMaxHeapGrowingFactorForManyFreedGlobalHandles = 1.3;
+
   double factor = HeapGrowingFactor(gc_speed, mutator_speed);
 
   if (FLAG_trace_gc_verbose) {
@@ -5671,6 +5676,10 @@ void Heap::SetOldGenerationAllocationLimit(intptr_t old_gen_size,
     factor = Min(factor, kMaxHeapGrowingFactorMemoryConstrained);
   }
 
+  if (freed_global_handles >= kFreedGlobalHandlesThreshold) {
+    factor = Min(factor, kMaxHeapGrowingFactorForManyFreedGlobalHandles);
+  }
+
   if (FLAG_stress_compaction ||
       mark_compact_collector()->reduce_memory_footprint_) {
     factor = kMinHeapGrowingFactor;