Oilpan: Split completeSweep() in idle tasks into chunks

Source/platform/heap/Heap.h

 /*
  * Copyright (C) 2013 Google Inc. 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
@@ skipping 725 matching lines @@
 
     virtual void clearFreeLists() { }
     void makeConsistentForSweeping();
 #if ENABLE(ASSERT)
     virtual bool isConsistentForSweeping() = 0;
 #endif
     size_t objectPayloadSizeForTesting();
     void prepareHeapForTermination();
     void prepareForSweep();
     Address lazySweep(size_t, size_t gcInfoIndex);
+    void sweepUnsweptPage();
+    // Returns true if we have swept all pages within the deadline.
+    // Returns false otherwise.
+    bool lazySweepWithDeadline(double deadlineSeconds);
     void completeSweep();
 
     ThreadState* threadState() { return m_threadState; }
     int heapIndex() const { return m_index; }
 
 protected:
     BasePage* m_firstPage;
     BasePage* m_firstUnsweptPage;
 
 private:
@@ skipping 1777 matching lines @@
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapVector<T, inlineCapacity>> : public GCInfoTrait<Vector<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapDeque<T, inlineCapacity>> : public GCInfoTrait<Deque<T, inlineCapacity, HeapAllocator>> { };
 template<typename T, typename U, typename V>
 struct GCInfoTrait<HeapHashCountedSet<T, U, V>> : public GCInfoTrait<HashCountedSet<T, U, V, HeapAllocator>> { };
 
 } // namespace blink
 
 #endif // Heap_h