ash: Add support for additional icons in apps search list.

chrome/browser/ui/app_list/search_builder.h

Index: chrome/browser/ui/app_list/search_builder.h
diff --git a/chrome/browser/ui/app_list/search_builder.h b/chrome/browser/ui/app_list/search_builder.h
index 70ceb19d9fd6b333f906c283dbb3409eeffb0d46..f5f2d26d91eff08262143764fbc305afc64cef2a 100644
--- a/chrome/browser/ui/app_list/search_builder.h
+++ b/chrome/browser/ui/app_list/search_builder.h
@@ -34,8 +34,15 @@ class SearchBuilder : public AutocompleteControllerDelegate {
   void StartSearch();
   void StopSearch();
 
+  // Opens |result|.
   void OpenResult(const app_list::SearchResult& result, int event_flags);
 
+  // Invokes a custom action on |result|.  |action_index| corresponds to the
+  // index of the selected icon in |result.action_icons()|.
+  void InvokeResultAction(const app_list::SearchResult& result,
+                          int action_index,
+                          int event_flags);
+
  private:
   // Populates result list from AutocompleteResult.
   void PopulateFromACResult(const AutocompleteResult& result);