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 190b95c5d685f66909c4bda26dc0d236cec1c34e..b8c43adb270729512c9ecc2f71ab4026e3905df4 100644
--- a/athena/main/url_search_provider.cc
+++ b/athena/main/url_search_provider.cc
@@ -170,7 +170,11 @@ class UrlSearchResult : public app_list::SearchResult {
   virtual ~UrlSearchResult() {}
 
  private:
-  // Overriddenn from app_list::SearchResult:
+  // Overridden from app_list::SearchResult:
+  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);