Remove orphaned pages from Oilpan

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

Index: third_party/WebKit/Source/platform/heap/VisitorImpl.h
diff --git a/third_party/WebKit/Source/platform/heap/VisitorImpl.h b/third_party/WebKit/Source/platform/heap/VisitorImpl.h
index f2e90e00bfc7f4be09a74bc76448f26a6c59de66..ec0b537f405f2244a64577f6fbf70db3f19d52ad 100644
--- a/third_party/WebKit/Source/platform/heap/VisitorImpl.h
+++ b/third_party/WebKit/Source/platform/heap/VisitorImpl.h
@@ -18,14 +18,6 @@ inline void Visitor::markHeader(HeapObjectHeader* header,
   DCHECK(header);
   DCHECK(objectPointer);
 
-  // If you hit this DCHECK, 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 DCHECK, but it is OK because
-  // release builds will crash in the following header->isMarked()
-  // because all the entries of the orphaned arenas are zapped.
-  DCHECK(!pageFromObject(objectPointer)->orphaned());
-
   if (header->isMarked())
     return;