Show Play Store rating and price in app list

ui/app_list/search_result_observer.h

Index: ui/app_list/search_result_observer.h
diff --git a/ui/app_list/search_result_observer.h b/ui/app_list/search_result_observer.h
index 3987e88736d1c4c6b255b615b5bf781ab035c10e..ee50bd49447aec5310516ccabc761f0fc6ec45b7 100644
--- a/ui/app_list/search_result_observer.h
+++ b/ui/app_list/search_result_observer.h
@@ -17,6 +17,12 @@ class APP_LIST_EXPORT SearchResultObserver {
   // Invoked when the SearchResult's badge icon has changed.
   virtual void OnBadgeIconChanged() {}
 
+  // Invoked when the SearchResult's app rating has changed.
+  virtual void OnRatingChanged() {}
+
+  // Invoked when the SearchResult's app price has changed.
+  virtual void OnPriceChanged() {}
+
   // Invoked when the SearchResult's actions have changed.
   virtual void OnActionsChanged() {}