Add a proper shadow to the experimental app list search box.

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"
@@ skipping 30 matching lines @@
  public:
   SearchBoxView(SearchBoxViewDelegate* delegate,
                 AppListViewDelegate* view_delegate);
   ~SearchBoxView() override;
 
   void ModelChanged();
   bool HasSearch() const;
   void ClearSearch();
   void InvalidateMenu();
 
+  // 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);
+
   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;
@@ skipping 28 matching lines @@
   // Overridden from SpeechUIModelObserver:
   void OnSpeechRecognitionStateChanged(
       SpeechRecognitionState new_state) override;
 
   SearchBoxViewDelegate* delegate_;  // Not owned.
   AppListViewDelegate* view_delegate_;  // Not owned.
   AppListModel* model_;  // Owned by the profile-keyed service.
 
   scoped_ptr<AppListMenuViews> menu_;
 
+  views::View* content_container_;     // Owned by views hierarchy.
   views::ImageView* icon_view_;  // Owned by views hierarchy.
   views::ImageButton* back_button_;    // Owned by views hierarchy.
   views::ImageButton* speech_button_;  // Owned by views hierarchy.
   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_