Supplement should have a Member to the corresponding Supplementable object

third_party/WebKit/Source/core/workers/WorkerClients.h

Index: third_party/WebKit/Source/core/workers/WorkerClients.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerClients.h b/third_party/WebKit/Source/core/workers/WorkerClients.h
index f38fae15a4b2666a9506ad25bdbf0cd5543a7d41..66467fc7f2669a27aef60317fae4402e5101c119 100644
--- a/third_party/WebKit/Source/core/workers/WorkerClients.h
+++ b/third_party/WebKit/Source/core/workers/WorkerClients.h
@@ -42,8 +42,8 @@ class WorkerClients;
 // This is created on the main thread, passed to the worker thread and
 // attached to WorkerGlobalScope when it is created.
 // This class can be used to provide "client" implementations to Workers.
-class WorkerClients final : public GarbageCollected<WorkerClients>,
-                            public Supplementable<WorkerClients> {
+class CORE_EXPORT WorkerClients final : public GarbageCollected<WorkerClients>,
+                                        public Supplementable<WorkerClients> {
   USING_GARBAGE_COLLECTED_MIXIN(WorkerClients);
   WTF_MAKE_NONCOPYABLE(WorkerClients);