Make app list search box into a Widget.

ui/app_list/views/app_list_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_APP_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 77 matching lines @@
 
   void UpdateBounds();
 
   // Enables/disables a semi-transparent overlay over the app list (good for
   // hiding the app list when a modal dialog is being shown).
   void SetAppListOverlayVisible(bool visible);
 
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
-  SearchBoxView* search_box_view() const { return search_box_view_; }
+  views::Widget* search_box_widget() const { return search_box_widget_; }
 
   // Overridden from views::View:
   gfx::Size GetPreferredSize() const override;
   void Paint(gfx::Canvas* canvas, const views::CullSet& cull_set) override;
   void OnThemeChanged() override;
 
   // WidgetDelegate overrides:
   bool ShouldHandleSystemCommands() const override;
 
   // Overridden from AppListViewDelegateObserver:
@@ skipping 22 matching lines @@
   // Overridden from views::View:
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
   void Layout() override;
   void SchedulePaintInRect(const gfx::Rect& rect) override;
 
  private:
   friend class ::test::AppListViewTestApi;
 
   void InitContents(gfx::NativeView parent, int initial_apps_page);
 
+  void InitChildWidgets();
+
   void InitAsBubbleInternal(gfx::NativeView parent,
                             int initial_apps_page,
                             views::BubbleBorder::Arrow arrow,
                             bool border_accepts_events,
                             const gfx::Vector2d& anchor_offset);
 
   // Overridden from views::BubbleDelegateView:
   void OnBeforeBubbleWidgetInit(views::Widget::InitParams* params,
                                 views::Widget* widget) const override;
 
   // Overridden from views::WidgetDelegateView:
   views::View* GetInitiallyFocusedView() override;
   gfx::ImageSkia GetWindowIcon() override;
   bool WidgetHasHitTestMask() const override;
   void GetWidgetHitTestMask(gfx::Path* mask) const override;
 
   // Overridden from views::WidgetObserver:
   void OnWidgetDestroying(views::Widget* widget) override;
   void OnWidgetVisibilityChanged(views::Widget* widget, bool visible) override;
   void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
 
   // Overridden from SpeechUIModelObserver:
   void OnSpeechRecognitionStateChanged(
       SpeechRecognitionState new_state) override;
 
   AppListViewDelegate* delegate_;  // Weak. Owned by AppListService.
 
   AppListMainView* app_list_main_view_;
-  SearchBoxView* search_box_view_;
   SpeechView* speech_view_;
 
+  views::Widget* search_box_widget_;  // Owned by the app list's widget.
+  SearchBoxView* search_box_view_;    // Owned by |search_box_widget_|.
+
   // The red "experimental" banner for the experimental app list.
   views::ImageView* experimental_banner_view_;
 
   // A semi-transparent white overlay that covers the app list while dialogs are
   // open.
   views::View* overlay_view_;
 
   ObserverList<AppListViewObserver> observers_;
   scoped_ptr<HideViewAnimationObserver> animation_observer_;
 
   // For UMA and testing. If non-null, triggered when the app list is painted.
   base::Closure next_paint_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_