Add basic support of URL/search query to Athena home card.

athena/main/url_search_provider.h

Index: athena/main/url_search_provider.h
diff --git a/athena/main/url_search_provider.h b/athena/main/url_search_provider.h
index 6ee83014d201fb5246bfc1f29256522f72426a94..d7c9177c57081fd88d77f2e2b433d45175baa60a 100644
--- a/athena/main/url_search_provider.h
+++ b/athena/main/url_search_provider.h
@@ -5,8 +5,11 @@
 #ifndef ATHENA_MAIN_URL_SEARCH_PROVIDER_H_
 #define ATHENA_MAIN_URL_SEARCH_PROVIDER_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "ui/app_list/search_provider.h"
 
+class TemplateURLService;
+
 namespace content {
 class BrowserContext;
 }
@@ -26,6 +29,9 @@ class UrlSearchProvider : public app_list::SearchProvider {
  private:
   content::BrowserContext* browser_context_;
 
+  // TODO(mukai): This should be provided through BrowserContextKeyedService.
+  scoped_ptr<TemplateURLService> template_url_service_;
+
   DISALLOW_COPY_AND_ASSIGN(UrlSearchProvider);
 };