Introduces UMA for app-list voice search.

ui/app_list/app_list_view_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 73 matching lines @@
 
   // Invoked to start a new search. Delegate collects query input from
   // SearchBoxModel and populates SearchResults. Both models are sub models
   // of AppListModel.
   virtual void StartSearch() = 0;
 
   // Invoked to stop the current search.
   virtual void StopSearch() = 0;
 
   // Invoked to open the search result.
-  virtual void OpenSearchResult(SearchResult* result, int event_flags) = 0;
+  virtual void OpenSearchResult(SearchResult* result,
+                                bool auto_launch,
+                                int event_flags) = 0;
 
   // Called to invoke a custom action on |result|.  |action_index| corresponds
   // to the index of an icon in |result.action_icons()|.
   virtual void InvokeSearchResultAction(SearchResult* result,
                                         int action_index,
                                         int event_flags) = 0;
 
   // Gets the timeout for auto-launching the first search result, or 0 if the
   //  auto-launch should not happen for the current search session.
   virtual base::TimeDelta GetAutoLaunchTimeout() = 0;
@@ skipping 40 matching lines @@
   virtual const Users& GetUsers() const = 0;
 
   // Adds/removes an observer for profile changes.
   virtual void AddObserver(AppListViewDelegateObserver* observer) {}
   virtual void RemoveObserver(AppListViewDelegateObserver* observer) {}
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_