Make classes and structures in core/workers, core/timing and core/testing fast-allocated.

Source/core/workers/WorkerClients.h

Index: Source/core/workers/WorkerClients.h
diff --git a/Source/core/workers/WorkerClients.h b/Source/core/workers/WorkerClients.h
index 54b34d9dbfe9a938eb383c3cf22301e3a4acf5db..b0bbc99f4a6bbc681279c4561d9a93008985dbda 100644
--- a/Source/core/workers/WorkerClients.h
+++ b/Source/core/workers/WorkerClients.h
@@ -39,9 +39,10 @@ namespace blink {
 // 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 : public NoBaseWillBeGarbageCollectedFinalized<WorkerClients>, public WillBeHeapSupplementable<WorkerClients> {
+class WorkerClients final : public NoBaseWillBeGarbageCollectedFinalized<WorkerClients>, public WillBeHeapSupplementable<WorkerClients> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(WorkerClients);
     WTF_MAKE_NONCOPYABLE(WorkerClients);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(WorkerClients);
 public:
     static PassOwnPtrWillBeRawPtr<WorkerClients> create()
     {