Simplifies the structure of app_list search a bit.

athena/main/url_search_provider.cc

Index: athena/main/url_search_provider.cc
diff --git a/athena/main/url_search_provider.cc b/athena/main/url_search_provider.cc
index 23b34f83d50150fe32b8d25741ec1fd39a596072..5160ed788088030706f1284e2efbe7787b3f0fc3 100644
--- a/athena/main/url_search_provider.cc
+++ b/athena/main/url_search_provider.cc
@@ -171,7 +171,11 @@ class UrlSearchResult : public app_list::SearchResult {
 
  private:
   // Overriddenn from app_list::SearchResult:
-  virtual void Open(int event_flags) OVERRIDE {
+  virtual scoped_ptr<app_list::SearchResult> Duplicate() override {
+    return make_scoped_ptr(new UrlSearchResult(browser_context_, match_));
+  }
+
+  virtual void Open(int event_flags) override {
     Activity* activity = ActivityFactory::Get()->CreateWebActivity(
         browser_context_, base::string16(), match_.destination_url);
     Activity::Show(activity);