Uses child views in Autofill Popup so we can trigger

chrome/browser/ui/autofill/autofill_popup_view.h

Index: chrome/browser/ui/autofill/autofill_popup_view.h
diff --git a/chrome/browser/ui/autofill/autofill_popup_view.h b/chrome/browser/ui/autofill/autofill_popup_view.h
index 4bb752fe467bf8df3249916f09268fbc35640c29..ec4e533098340efdd290af3905e71397786eee7f 100644
--- a/chrome/browser/ui/autofill/autofill_popup_view.h
+++ b/chrome/browser/ui/autofill/autofill_popup_view.h
@@ -9,6 +9,7 @@
 
 #include "base/strings/string16.h"
 #include "chrome/browser/ui/autofill/autofill_popup_view_delegate.h"
+#include "ui/accessibility/ax_enums.h"
 
 namespace autofill {
 
@@ -18,17 +19,22 @@ class AutofillPopupController;
 // AutofillPopupView.
 class AutofillPopupView {
  public:
+  static constexpr int kNoSelection = -1;
+
   // Displays the Autofill popup and fills it in with data from the controller.
   virtual void Show() = 0;
 
   // Hides the popup from view. This will cause the popup to be deleted.
   virtual void Hide() = 0;
 
-  // Invalidates the given row and redraw it.
-  virtual void InvalidateRow(size_t row) = 0;
+  // Invalidates the given rows and redraws them. A value of |kNoSelection| for
+  // either parameter indicates the parameter does not correspond to a
+  // suggestion.
+  virtual void OnSelectedRowChanged(size_t previous_row_selection,
+                                    size_t current_row_selection) = 0;
 
-  // Refreshes the position of the popup.
-  virtual void UpdateBoundsAndRedrawPopup() = 0;
+  // Refreshes the position and redraws popup when suggestions change.
+  virtual void OnSuggestionsChanged() = 0;
 
   // Factory function for creating the view.
   static AutofillPopupView* Create(AutofillPopupController* controller);