Oilpan: support eager tracing of objects when marking.

Source/platform/heap/HeapTerminatedArray.h

Index: Source/platform/heap/HeapTerminatedArray.h
diff --git a/Source/platform/heap/HeapTerminatedArray.h b/Source/platform/heap/HeapTerminatedArray.h
index de1cd4649b94b433fb7e3354e9d71446fd491950..fbead0d83a5bcef0e2c91a04a23bd8eccb6c5df0 100644
--- a/Source/platform/heap/HeapTerminatedArray.h
+++ b/Source/platform/heap/HeapTerminatedArray.h
@@ -49,6 +49,12 @@ private:
     template<typename U, template <typename> class> friend class WTF::TerminatedArrayBuilder;
 };
 
+template<typename T>
+class TraceEagerlyTrait<HeapTerminatedArray<T> > {
+public:
+    static const bool value = IS_EAGERLY_TRACED_HEAP_COLLECTION(T);
+};
+
 } // namespace blink
 
 #endif // HeapTerminatedArray_h