Adding freelist statistics to blink gc dump provider.

Source/platform/heap/ThreadState.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 624 matching lines @@
     }
     BaseHeap* expandedVectorBackingHeap(size_t gcInfoIndex);
     static bool isVectorHeapIndex(int heapIndex)
     {
         return Vector1HeapIndex <= heapIndex && heapIndex <= Vector4HeapIndex;
     }
     void allocationPointAdjusted(int heapIndex);
     void promptlyFreed(size_t gcInfoIndex);
 
 private:
+    enum SnapshotType {
+        HeapSnapshot,
+        FreelistSnapshot
+    };
+
     ThreadState();
     ~ThreadState();
 
     NO_SANITIZE_ADDRESS void copyStackUntilSafePointScope();
     void clearSafePointScopeMarker()
     {
         m_safePointStackCopy.clear();
         m_safePointScopeMarker = nullptr;
     }
 
@@ skipping 27 matching lines @@
     // to sweep away any objects that are left on this heap.
     // We assert that nothing must remain after this cleanup.
     // If assertion does not hold we crash as we are potentially
     // in the dangling pointer situation.
     void cleanup();
     void cleanupPages();
 
     void unregisterPreFinalizerInternal(void*);
     void invokePreFinalizers();
 
-    void takeSnapshot();
+    void takeSnapshot(SnapshotType);
 #if ENABLE(GC_PROFILING)
     void snapshotFreeList();
 #endif
     void clearHeapAges();
     int heapIndexOfVectorHeapLeastRecentlyExpanded(int beginHeapIndex, int endHeapIndex);
 
     friend class SafePointAwareMutexLocker;
     friend class SafePointBarrier;
     friend class SafePointScope;
 
@@ skipping 72 matching lines @@
 };
 
 template<> class ThreadStateFor<AnyThread> {
 public:
     static ThreadState* state() { return ThreadState::current(); }
 };
 
 } // namespace blink
 
 #endif // ThreadState_h