Uses child views in Autofill Popup so we can trigger

chrome/browser/ui/views/autofill/autofill_popup_base_view.h

 // Copyright 2014 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 CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
@@ skipping 17 matching lines @@
   explicit AutofillPopupBaseView(AutofillPopupViewDelegate* delegate,
                                  views::Widget* parent_widget);
   ~AutofillPopupBaseView() override;
 
   // Show this popup. Idempotent.
   void DoShow();
 
   // Hide the widget and delete |this|.
   void DoHide();
 
-  // Update size of popup and paint.
-  void DoUpdateBoundsAndRedrawPopup();
+  // Update size of popup and paint (virtual for testing).
+  virtual void DoUpdateBoundsAndRedrawPopup();
 
  private:
   friend class AutofillPopupBaseViewTest;
 
   // views::Views implementation.
   void OnMouseCaptureLost() override;
   bool OnMouseDragged(const ui::MouseEvent& event) override;
   void OnMouseExited(const ui::MouseEvent& event) override;
   void OnMouseMoved(const ui::MouseEvent& event) override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
@@ skipping 32 matching lines @@
   base::Time show_time_;
 
   base::WeakPtrFactory<AutofillPopupBaseView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillPopupBaseView);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_AUTOFILL_POPUP_BASE_VIEW_H_