Remove orphaned pages from Oilpan

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/StackFrameDepth.h"
@@ skipping 90 matching lines @@
 
 template <typename T>
 class AdjustAndMarkTrait<T, true> {
   STATIC_ONLY(AdjustAndMarkTrait);
 
  public:
   template <typename VisitorDispatcher>
   static void mark(VisitorDispatcher visitor, const T* self) {
     if (!self)
       return;
-
-    // If you hit this ASSERT, it means that there is a dangling pointer
-    // from a live thread heap to a dead thread heap. We must eliminate
-    // the dangling pointer.
-    // Release builds don't have the ASSERT, but it is OK because
-    // release builds will crash at the following self->adjustAndMark
-    // because all the entries of the orphaned arenas are zeroed out and
-    // thus the item does not have a valid vtable.
-    ASSERT(!pageFromObject(self)->orphaned());
     self->adjustAndMark(visitor);
   }
 };
 
 template <typename T, bool isTraceable>
 struct TraceIfEnabled;
 
 template <typename T>
 struct TraceIfEnabled<T, false> {
   STATIC_ONLY(TraceIfEnabled);
@@ skipping 663 matching lines @@
     // since iterating over the hash table backing will find the whole
     // chain.
     visitor->markNoTracing(node);
     return false;
   }
 };
 
 }  // namespace WTF
 
 #endif