mash: Preliminary support for shelf auto-hide

ash/shelf/shelf_widget_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/shelf/shelf_widget.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 323 matching lines @@
   ~TestShelfDelegate() override {}
 
   // ShelfDelegate implementation.
   void OnShelfCreated(Shelf* shelf) override {
     shelf->SetAlignment(initial_alignment_);
     shelf->SetAutoHideBehavior(initial_auto_hide_behavior_);
   }
   void OnShelfDestroyed(Shelf* shelf) override {}
   void OnShelfAlignmentChanged(Shelf* shelf) override {}
   void OnShelfAutoHideBehaviorChanged(Shelf* shelf) override {}
+  void OnShelfAutoHideStateChanged(Shelf* shelf) override {}
+  void OnShelfVisibilityStateChanged(Shelf* shelf) override {}
   ShelfID GetShelfIDForAppID(const std::string& app_id) override { return 0; }
   bool HasShelfIDToAppIDMapping(ShelfID id) const override { return false; }
   const std::string& GetAppIDForShelfID(ShelfID id) override {
     return base::EmptyString();
   }
   void PinAppWithID(const std::string& app_id) override {}
   bool IsAppPinned(const std::string& app_id) override { return false; }
   void UnpinAppWithID(const std::string& app_id) override {}
 
  private:
@@ skipping 100 matching lines @@
 }
 
 TEST_F(ShelfWidgetTestWithDelegate, CreateLockedShelf) {
   // The auto hide state 'HIDDEN' is returned for any non-auto-hide behavior.
   TestCreateShelfWithInitialValues(wm::SHELF_ALIGNMENT_BOTTOM_LOCKED,
                                    SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
                                    SHELF_VISIBLE, SHELF_AUTO_HIDE_HIDDEN);
 }
 
 }  // namespace ash