Adding freelist statistics to blink gc dump provider.

Source/platform/heap/ThreadState.cpp

Index: Source/platform/heap/ThreadState.cpp
diff --git a/Source/platform/heap/ThreadState.cpp b/Source/platform/heap/ThreadState.cpp
index 106c1c799bf7e811ad60b8e75f08e6a7595ae6a6..a004621ed45e214089a946f8a093240a07aa6c8c 100644
--- a/Source/platform/heap/ThreadState.cpp
+++ b/Source/platform/heap/ThreadState.cpp
@@ -1384,6 +1384,7 @@ void ThreadState::takeSnapshot()
         String allocatorBaseName;                                                                              \
         allocatorBaseName = String::format("blink_gc/thread_%lu/heaps/" #HeapType, (unsigned long)(m_thread)); \
         m_heaps[HeapType##HeapIndex]->takeSnapshot(allocatorBaseName);                                         \
+        m_heaps[HeapType##HeapIndex]->takeFreelistSnapshot(allocatorBaseName);                                 \
     }
 
     SNAPSHOT_HEAP(NormalPage1);