Allocate XMLHttpRequest on the eagerly finalized heap.

Source/platform/heap/Heap.h

Index: Source/platform/heap/Heap.h
diff --git a/Source/platform/heap/Heap.h b/Source/platform/heap/Heap.h
index 37d5ce4926273bd6d576eb95f0fef4019b867434..bf207d1fe657d940f9d4ed55865d6784dc2d4eb7 100644
--- a/Source/platform/heap/Heap.h
+++ b/Source/platform/heap/Heap.h
@@ -1179,6 +1179,8 @@ public:                                           \
     {                                             \
         return allocateObject(size, true);        \
     }
+
+#define IS_EAGERLY_FINALIZED() (pageFromObject(this)->heap()->heapIndex() == ThreadState::EagerSweepHeapIndex)
 #if ENABLE(ASSERT) && ENABLE(OILPAN)
 class VerifyEagerFinalization {
 public:
@@ -1192,7 +1194,7 @@ public:
         // eagerly finalized. Declaring and defining an 'operator new'
         // for this class is what's required -- consider using
         // DECLARE_EAGER_FINALIZATION_OPERATOR_NEW().
-        ASSERT(pageFromObject(this)->heap()->heapIndex() == ThreadState::EagerSweepHeapIndex);
+        ASSERT(IS_EAGERLY_FINALIZED());
     }
 };
 #define EAGERLY_FINALIZE()                             \