[Sync] Add a simple UI to sync-internals to create UserEvents.

components/sync/driver/about_sync_util.cc

 // 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.
 
 #include "components/sync/driver/about_sync_util.h"
 
 #include <string>
 #include <utility>
 
 #include "base/location.h"
@@ skipping 24 matching lines @@
 const char kAboutJS[] = "about.js";
 const char kChromeSyncJS[] = "chrome_sync.js";
 const char kDataJS[] = "data.js";
 const char kEventsJS[] = "events.js";
 const char kSearchJS[] = "search.js";
 const char kSyncIndexJS[] = "sync_index.js";
 const char kSyncLogJS[] = "sync_log.js";
 const char kSyncNodeBrowserJS[] = "sync_node_browser.js";
 const char kSyncSearchJS[] = "sync_search.js";
 const char kTypesJS[] = "types.js";
+const char kUserEventsJS[] = "user_events.js";
 
 // Message handlers.
 const char kDispatchEvent[] = "chrome.sync.dispatchEvent";
 const char kGetAllNodes[] = "getAllNodes";
 const char kGetAllNodesCallback[] = "chrome.sync.getAllNodesCallback";
 const char kRegisterForEvents[] = "registerForEvents";
 const char kRegisterForPerTypeCounters[] = "registerForPerTypeCounters";
 const char kRequestListOfTypes[] = "requestListOfTypes";
 const char kRequestUpdatedAboutInfo[] = "requestUpdatedAboutInfo";
+const char kRequestUserEventsVisibility[] = "requestUserEventsVisibility";
+const char kUserEventsVisibilityCallback[] =
+    "chrome.sync.userEventsVisibilityCallback";
+const char kWriteUserEvent[] = "writeUserEvent";
 
 // Other strings.
 const char kCommit[] = "commit";
 const char kCounters[] = "counters";
 const char kCounterType[] = "counterType";
 const char kModelType[] = "modelType";
 const char kOnAboutInfoUpdated[] = "onAboutInfoUpdated";
 const char kOnCountersUpdated[] = "onCountersUpdated";
 const char kOnProtocolEvent[] = "onProtocolEvent";
 const char kOnReceivedListOfTypes[] = "onReceivedListOfTypes";
@@ skipping 519 matching lines @@
   }
 
   about_info->Set("type_status", service->GetTypeStatusMap());
 
   return about_info;
 }
 
 }  // namespace sync_ui_util
 
 }  // namespace syncer