Allow collection of DOM objects in minor GC cycles.

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1884 matching lines @@
   // Checks whether a global GC is necessary
   GarbageCollector SelectGarbageCollector(AllocationSpace space,
                                           const char** reason);
 
   // Performs garbage collection
   // Returns whether there is a chance another major GC could
   // collect more garbage.
   bool PerformGarbageCollection(GarbageCollector collector,
                                 GCTracer* tracer);
 
+  bool IterateObjectGroups(ObjectVisitor* scavenge_visitor);
 
   inline void UpdateOldSpaceLimits();
 
   // Allocate an uninitialized object in map space.  The behavior is identical
   // to Heap::AllocateRaw(size_in_bytes, MAP_SPACE), except that (a) it doesn't
   // have to test the allocation space argument and (b) can reduce code size
   // (since both AllocateRaw and AllocateRawMap are inlined).
   MUST_USE_RESULT inline MaybeObject* AllocateRawMap();
 
   // Allocate an uninitialized object in the global property cell space.
@@ skipping 903 matching lines @@
   AssertNoAllocation no_alloc;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG || LIVE_OBJECT_LIST
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_