chromeos: Rename ash::WmShelf to Shelf

ash/shelf/shelf_controller.h

Index: ash/shelf/shelf_controller.h
diff --git a/ash/shelf/shelf_controller.h b/ash/shelf/shelf_controller.h
index acfed138b2ce0b4d1efb3457304f6d31c4896774..c12ce330c56c33367f9281528c13893c2bdc93cf 100644
--- a/ash/shelf/shelf_controller.h
+++ b/ash/shelf/shelf_controller.h
@@ -17,7 +17,7 @@
 
 namespace ash {
 
-class WmShelf;
+class Shelf;
 
 // Ash's implementation of the mojom::ShelfController interface. Chrome connects
 // to this interface to observe and manage the per-display ash shelf instances.
@@ -32,9 +32,9 @@ class ShelfController : public mojom::ShelfController {
   ShelfModel* model() { return &model_; }
 
   // Functions used to notify mojom::ShelfObserver instances of changes.
-  void NotifyShelfInitialized(WmShelf* shelf);
-  void NotifyShelfAlignmentChanged(WmShelf* shelf);
-  void NotifyShelfAutoHideBehaviorChanged(WmShelf* shelf);
+  void NotifyShelfInitialized(Shelf* shelf);
+  void NotifyShelfAlignmentChanged(Shelf* shelf);
+  void NotifyShelfAutoHideBehaviorChanged(Shelf* shelf);
 
   // mojom::Shelf:
   void AddObserver(mojom::ShelfObserverAssociatedPtrInfo observer) override;