Refactor AddScrollListItem() in system menu detailed views

ash/system/ime_menu/ime_list_view.cc

Index: ash/system/ime_menu/ime_list_view.cc
diff --git a/ash/system/ime_menu/ime_list_view.cc b/ash/system/ime_menu/ime_list_view.cc
index 334b42ece1673935fbd7a8346be65f81c9d33a8a..4d9cf07ade0cb4b146108ca996e8c3368df5b45f 100644
--- a/ash/system/ime_menu/ime_list_view.cc
+++ b/ash/system/ime_menu/ime_list_view.cc
@@ -112,8 +112,8 @@ class ImeListItemView : public ActionableView {
 
   void OnFocus() override {
     ActionableView::OnFocus();
-    if (ime_list_view_ && ime_list_view_->scroll_content())
-      ime_list_view_->scroll_content()->ScrollRectToVisible(bounds());
+    if (ime_list_view_)
+      ime_list_view_->ScrollItemToVisible(this);
   }
 
   void GetAccessibleNodeData(ui::AXNodeData* node_data) override {
@@ -221,7 +221,7 @@ void ImeListView::Update(const IMEInfoList& list,
       last_item_selected_with_keyboard_) {
     FocusCurrentImeIfNeeded();
   } else if (current_ime_view_) {
-    scroll_content()->ScrollRectToVisible(current_ime_view_->bounds());
+    ScrollItemToVisible(current_ime_view_);
   }
 }
 
@@ -232,6 +232,11 @@ void ImeListView::ResetImeListView() {
   current_ime_view_ = nullptr;
 }
 
+void ImeListView::ScrollItemToVisible(views::View* item_view) {
+  if (scroll_content())
+    scroll_content()->ScrollRectToVisible(item_view->bounds());
+}
+
 void ImeListView::CloseImeListView() {
   last_selected_item_id_.clear();
   current_ime_view_ = nullptr;
@@ -324,7 +329,7 @@ void ImeListView::VisibilityChanged(View* starting_from, bool is_visible) {
     return;
   }
 
-  scroll_content()->ScrollRectToVisible(current_ime_view_->bounds());
+  ScrollItemToVisible(current_ime_view_);
 }
 
 void ImeListView::FocusCurrentImeIfNeeded() {