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

apps/app_load_service.h

Index: apps/app_load_service.h
diff --git a/apps/app_load_service.h b/apps/app_load_service.h
index 566672ecbfef4d29944b05ec399008c60c0bfbb0..967a6cb9fa39b4d57f71f203803ef9c5b02fd461 100644
--- a/apps/app_load_service.h
+++ b/apps/app_load_service.h
@@ -30,9 +30,9 @@ class AppLoadService : public KeyedService,
                        public extensions::ExtensionRegistryObserver {
  public:
   enum PostReloadActionType {
-    LAUNCH,
+    RELOAD,

[benwells, 2014/10/28 21:22:47]

Nit: this should be LAUNCH_FOR_RELOAD. To answer your question on the other
comment, this is mainly a developer thing. It is useful when developing apps if
when you reload the app it launches it, if it was running.

[cylee1, 2014/10/29 16:39:59]

Done.

     RESTART,
-    LAUNCH_WITH_COMMAND_LINE,
+    LOAD_AND_LAUNCH,

[benwells, 2014/10/28 21:22:47]

Nit: This should be LAUNCH_FOR_LOAD_AND_LAUNCH

[cylee1, 2014/10/29 16:39:59]

Done.

   };
 
   struct PostReloadAction {