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

extensions/renderer/resources/app_runtime_custom_bindings.js

Index: extensions/renderer/resources/app_runtime_custom_bindings.js
diff --git a/extensions/renderer/resources/app_runtime_custom_bindings.js b/extensions/renderer/resources/app_runtime_custom_bindings.js
index 5910d6e95f3dc781b85199900b729376d9715b1a..579896eb2c9f23069ce6511a6e80ecc94897656b 100644
--- a/extensions/renderer/resources/app_runtime_custom_bindings.js
+++ b/extensions/renderer/resources/app_runtime_custom_bindings.js
@@ -47,19 +47,23 @@ eventBindings.registerArgumentMassager('app.runtime.onLaunched',
         $Array.push(items, item);
       }
       if (--numItems === 0) {
-        var data = { isKioskSession: launchData.isKioskSession };
-        if (items.length !== 0) {
-          data.id = launchData.id;
-          data.items = items;
+        if (items.length == 0) {
+          delete launchData.id;
+          delete launchData.items;
+        } else {
+          launchData.items = items;
         }
-        dispatch([data]);
+        dispatch([launchData]);
       }
     };
     $Array.forEach(launchData.items, function(item) {
-      var fs = GetIsolatedFileSystem(item.fileSystemId);
-      fs.root.getFile(item.baseName, {}, function(fileEntry) {
-        entryIdManager.registerEntry(item.entryId, fileEntry);
-        itemLoaded(null, { entry: fileEntry, type: item.mimeType });
+      var rawEntry = item.rawEntry;
+      delete item.rawEntry;
+      var fs = GetIsolatedFileSystem(rawEntry.fileSystemId);
+      fs.root.getFile(rawEntry.baseName, {}, function(fileEntry) {
+        entryIdManager.registerEntry(rawEntry.entryId, fileEntry);
+        item.entry = fileEntry;
+        itemLoaded(null, item);
       }, function(fileError) {
         itemLoaded(fileError);
       });