Uses child views in Autofill Popup so we can trigger

chrome/browser/ui/cocoa/autofill/autofill_popup_view_bridge.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 CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_POPUP_VIEW_BRIDGE_H_
 #define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_POPUP_VIEW_BRIDGE_H_
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
+#include "base/optional.h"
 #include "chrome/browser/ui/autofill/autofill_popup_view.h"
 #include "chrome/browser/ui/cocoa/autofill/autofill_popup_view_cocoa.h"
 
 @class AutofillPopupViewCocoa;
 @class NSWindow;
 
 namespace autofill {
 
 class AutofillPopupViewCocoaDelegate {
  public:
   // Returns the bounds of the item at |index| in the popup, relative to
   // the top left of the popup.
-  virtual gfx::Rect GetRowBounds(size_t index) = 0;
+  virtual gfx::Rect GetRowBounds(int index) = 0;
 
   // Gets the resource value for the given resource, returning -1 if the
   // resource isn't recognized.
   virtual int GetIconResourceID(const base::string16& resource_name) = 0;
 };
 
 // Mac implementation of the AutofillPopupView interface.
 // Serves as a bridge to an instance of the Objective-C class which actually
 // implements the view.
 class AutofillPopupViewBridge : public AutofillPopupView,
                                 public AutofillPopupViewCocoaDelegate {
  public:
   explicit AutofillPopupViewBridge(AutofillPopupController* controller);
 
   // AutofillPopupViewCocoaDelegate implementation.
-  gfx::Rect GetRowBounds(size_t index) override;
+  gfx::Rect GetRowBounds(int index) override;
   int GetIconResourceID(const base::string16& resource_name) override;
 
  private:
   ~AutofillPopupViewBridge() override;
 
   // AutofillPopupView implementation.
   void Hide() override;
   void Show() override;
-  void InvalidateRow(size_t row) override;
-  void UpdateBoundsAndRedrawPopup() override;
+  void OnSelectedRowChanged(base::Optional<int> previous_row_selection,
+                            base::Optional<int> current_row_selection) override;
+  void OnSuggestionsChanged() override;
 
   // Set the initial bounds of the popup, including its placement.
   void SetInitialBounds();
 
   // The native Cocoa view.
   base::scoped_nsobject<AutofillPopupViewCocoa> view_;
 
   AutofillPopupController* controller_;  // Weak.
 
   DISALLOW_COPY_AND_ASSIGN(AutofillPopupViewBridge);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_POPUP_VIEW_BRIDGE_H_