Make classes and structures in core/editing fast-allocated.

Source/core/editing/commands/UndoStack.h

Index: Source/core/editing/commands/UndoStack.h
diff --git a/Source/core/editing/commands/UndoStack.h b/Source/core/editing/commands/UndoStack.h
index ab2de28ff23788934ef4075966190d86582657ca..78a4af3a8fea2053e7d00131bb40d1dcee93ab0b 100644
--- a/Source/core/editing/commands/UndoStack.h
+++ b/Source/core/editing/commands/UndoStack.h
@@ -41,6 +41,8 @@ class LocalFrame;
 class UndoStep;
 
 class UndoStack final : public NoBaseWillBeGarbageCollected<UndoStack> {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(UndoStack);
+    WTF_MAKE_NONCOPYABLE(UndoStack);
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(UndoStack)
 public:
     static PassOwnPtrWillBeRawPtr<UndoStack> create();