Adds the speech recognition button to the app-list searchbox.

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 e0e8b11b24e62f86fbcd191fd72fe26744475df6..49eb4f480be03b8079c81a8c3293297b14e7f3e3 100644
--- a/ash/shell/app_list.cc
+++ b/ash/shell/app_list.cc
@@ -323,6 +323,10 @@ class ExampleAppListViewDelegate : public app_list::AppListViewDelegate {
     // Nothing needs to be done.
   }
 
+  virtual void ToggleSpeechRecognition() OVERRIDE {
+    NOTIMPLEMENTED();
+  }
+
   virtual void ShowForProfileByPath(
       const base::FilePath& profile_path) OVERRIDE {
     // Nothing needs to be done.