Simple BlinkGC heap compaction.

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

 // Copyright 2015 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 TraceTraits_h
 #define TraceTraits_h
 
 #include "platform/heap/GCInfo.h"
 #include "platform/heap/Heap.h"
 #include "platform/heap/InlinedGlobalMarkingVisitor.h"
@@ skipping 213 matching lines @@
     AdjustAndMarkTrait<T>::mark(visitor, t);
   }
 };
 
 template <typename T>
 class TraceTrait<const T> : public TraceTrait<T> {};
 
 template <typename T>
 void TraceTrait<T>::trace(Visitor* visitor, void* self) {
   static_assert(WTF::IsTraceable<T>::value, "T should not be traced");
-  if (visitor->getMarkingMode() == Visitor::GlobalMarking) {
+  if (visitor->isGlobalMarking()) {
     // Switch to inlined global marking dispatch.
-    static_cast<T*>(self)->trace(InlinedGlobalMarkingVisitor(visitor->state()));
+    static_cast<T*>(self)->trace(InlinedGlobalMarkingVisitor(
+        visitor->state(), visitor->getMarkingMode()));
   } else {
     static_cast<T*>(self)->trace(visitor);
   }
 }
 
 template <typename T>
 void TraceTrait<T>::trace(InlinedGlobalMarkingVisitor visitor, void* self) {
   static_assert(WTF::IsTraceable<T>::value, "T should not be traced");
   static_cast<T*>(self)->trace(visitor);
 }
@@ skipping 524 matching lines @@
     // since iterating over the hash table backing will find the whole
     // chain.
     visitor->markNoTracing(node);
     return false;
   }
 };
 
 }  // namespace WTF
 
 #endif