Oilpan: Add ENABLE_LAZY_SWEEPING and ENABLE_IDLE_GC to features.gypi

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 fdf24de7de2a5a962ffc337dedc6b423320e5e84..f3a23d12d1ab3ce5797790bdbf9c92e875c72820 100644
--- a/Source/platform/heap/Heap.h
+++ b/Source/platform/heap/Heap.h
@@ -829,7 +829,7 @@ public:
     static bool willObjectBeLazilySwept(const T* objectPointer)
     {
         static_assert(IsGarbageCollectedType<T>::value, "only objects deriving from GarbageCollected can be used.");
-#if ENABLE_LAZY_SWEEPING
+#if ENABLE(LAZY_SWEEPING)
         BasePage* page = pageFromObject(objectPointer);
         if (page->hasBeenSwept())
             return false;
@@ -1106,7 +1106,7 @@ public:
     }
 };
 
-#if ENABLE_LAZY_SWEEPING
+#if ENABLE(LAZY_SWEEPING)
 #define EAGERLY_FINALIZE() typedef int IsEagerlyFinalizedMarker
 #define EAGERLY_FINALIZE_WILL_BE_REMOVED()
 #else