Reenable heap compaction after r466956

third_party/WebKit/Source/platform/heap/HeapCompact.h

 // Copyright 2016 The Chromium 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 HeapCompact_h
 #define HeapCompact_h
 
 #include "platform/PlatformExport.h"
 #include "platform/heap/BlinkGC.h"
 #include "platform/wtf/DataLog.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/ThreadingPrimitives.h"
 #include "platform/wtf/Vector.h"
 
 #include <bitset>
 #include <utility>
 
 // Compaction-specific debug switches:
 
 // Set to 0 to prevent compaction GCs, disabling the heap compaction feature.
-#define ENABLE_HEAP_COMPACTION 0
+#define ENABLE_HEAP_COMPACTION 1
 
 // Emit debug info during compaction.
 #define DEBUG_HEAP_COMPACTION 0
 
 // Emit stats on freelist occupancy.
 // 0 - disabled, 1 - minimal, 2 - verbose.
 #define DEBUG_HEAP_FREELIST 0
 
 // Log the amount of time spent compacting.
 #define DEBUG_LOG_HEAP_COMPACTION_RUNNING_TIME 0
@@ skipping 152 matching lines @@
 #if DEBUG_HEAP_FREELIST == 2
 #define LOG_HEAP_FREELIST_VERBOSE(msg, ...) \
   LOG_HEAP_COMPACTION_INTERNAL(msg, ##__VA_ARGS__)
 #else
 #define LOG_HEAP_FREELIST_VERBOSE(msg, ...) \
   do {                                      \
   } while (0)
 #endif
 
 #endif  // HeapCompact_h