Add a new field "source" in launchData of chrome.app.runtime.onLaunched() to trace launch source.

apps/app_load_service.h

 // Copyright 2013 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 APPS_APP_LOAD_SERVICE_H_
 #define APPS_APP_LOAD_SERVICE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 12 matching lines @@
 
 namespace apps {
 
 // Monitors apps being reloaded and performs app specific actions (like launch
 // or restart) on them. Also provides an interface to schedule these actions.
 class AppLoadService : public KeyedService,
                        public content::NotificationObserver,
                        public extensions::ExtensionRegistryObserver {
  public:
   enum PostReloadActionType {
-    LAUNCH,
+    LAUNCH_FOR_RELOAD,
     RESTART,
-    LAUNCH_WITH_COMMAND_LINE,
+    LAUNCH_FOR_LOAD_AND_LAUNCH,
   };
 
   struct PostReloadAction {
     PostReloadAction();
 
     PostReloadActionType action_type;
     base::CommandLine command_line;
     base::FilePath current_dir;
   };
 
@@ skipping 39 matching lines @@
   std::map<std::string, PostReloadAction> post_reload_actions_;
   content::NotificationRegistrar registrar_;
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLoadService);
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_LOAD_SERVICE_H_