Enables the 'hotword not listening' icon in the search box.

ash/shell/app_list.cc

Index: ash/shell/app_list.cc
diff --git a/ash/shell/app_list.cc b/ash/shell/app_list.cc
index 10e1a6146e1f50fa82ef8639422a6bce3ad8e2f7..53da0149cd7cbb566e200d346bf2c4d0ab01228e 100644
--- a/ash/shell/app_list.cc
+++ b/ash/shell/app_list.cc
@@ -197,7 +197,8 @@ class ExampleSearchResult : public app_list::SearchResult {
 class ExampleAppListViewDelegate : public app_list::AppListViewDelegate {
  public:
   ExampleAppListViewDelegate()
-      : model_(new app_list::AppListModel) {
+      : model_(new app_list::AppListModel),
+        speech_ui_(app_list::SPEECH_RECOGNITION_OFF) {
     PopulateApps();
     DecorateSearchBox(model_->search_box());
   }