Oilpan: rename EAGERLY_SWEEP() as EAGERLY_FINALIZED().

Source/platform/LifecycleObserver.h

Index: Source/platform/LifecycleObserver.h
diff --git a/Source/platform/LifecycleObserver.h b/Source/platform/LifecycleObserver.h
index a36dc3f0e9567510087bc31db7d5e02d945ee0f5..3295d819579d6bb3fb02d801ac14e84aae4f7fa2 100644
--- a/Source/platform/LifecycleObserver.h
+++ b/Source/platform/LifecycleObserver.h
@@ -44,9 +44,7 @@ public:
     }
 #endif
 
-    // TODO(Oilpan): remove eager sweeping once LifecycleObserver is
-    // always on the heap.
-    EAGERLY_SWEEP();
+    EAGERLY_FINALIZE_WILL_BE_REMOVED();
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         visitor->trace(m_lifecycleContext);