Animate the app list search box shadow.

ui/app_list/views/search_box_view.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
 #define UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_
 
 #include <string>
 
 #include "ui/app_list/search_box_model_observer.h"
 #include "ui/app_list/speech_ui_model_observer.h"
+#include "ui/gfx/shadow_value.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
 #include "ui/views/view.h"
 
 namespace views {
 class ImageView;
 class MenuButton;
 class Textfield;
 }  // namespace views
@@ skipping 19 matching lines @@
  public:
   SearchBoxView(SearchBoxViewDelegate* delegate,
                 AppListViewDelegate* view_delegate);
   ~SearchBoxView() override;
 
   void ModelChanged();
   bool HasSearch() const;
   void ClearSearch();
   void InvalidateMenu();
 
+  // Sets the shadow border of the search box.
+  void SetShadow(const gfx::ShadowValue& shadow);
+
   // Returns the bounds to use for the view (including the shadow) given the
   // desired bounds of the search box contents.
   gfx::Rect GetViewBoundsForSearchBoxContentsBounds(
       const gfx::Rect& rect) const;
 
   views::ImageButton* back_button() { return back_button_; }
   views::Textfield* search_box() { return search_box_; }
 
   void set_contents_view(views::View* contents_view) {
     contents_view_ = contents_view;
   }
 
   // Overridden from views::View:
   gfx::Size GetPreferredSize() const override;
   bool OnMouseWheel(const ui::MouseWheelEvent& event) override;
   void OnEnabledChanged() override;
 
+  // Returns the shadow values for the search box at |z_height|.
+  static gfx::ShadowValue GetShadowForZHeight(int z_height);
+
  private:
   // Updates model text and selection model with current Textfield info.
   void UpdateModel();
 
   // Fires query change notification.
   void NotifyQueryChanged();
 
   // Overridden from views::TextfieldController:
   void ContentsChanged(views::Textfield* sender,
                        const base::string16& new_contents) override;
@@ skipping 30 matching lines @@
   views::MenuButton* menu_button_;  // Owned by views hierarchy.
   views::Textfield* search_box_;  // Owned by views hierarchy.
   views::View* contents_view_;  // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_SEARCH_BOX_VIEW_H_