Set lower allocation limit in idle notification only if no GC happend recently.

src/heap/heap.h

 // Copyright 2012 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_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 2111 matching lines @@
 
   // Total time spent in GC.
   double total_gc_time_ms_;
 
   // Maximum size of objects alive after GC.
   intptr_t max_alive_after_gc_;
 
   // Minimal interval between two subsequent collections.
   double min_in_mutator_;
 
-  // Cumulative GC time spent in marking
+  // Cumulative GC time spent in marking.
   double marking_time_;
 
-  // Cumulative GC time spent in sweeping
+  // Cumulative GC time spent in sweeping.
   double sweeping_time_;
 
-  // Last time an idle notification happened
+  // Last time an idle notification happened.
   double last_idle_notification_time_;
 
+  // Last time a garbage collection happened.
+  double last_gc_time_;
+
   MarkCompactCollector mark_compact_collector_;
 
   StoreBuffer store_buffer_;
 
   Marking marking_;
 
   IncrementalMarking incremental_marking_;
 
   GCIdleTimeHandler gc_idle_time_handler_;
 
@@ skipping 495 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_H_