Bug 1638396 - add backed changes test_file_os_delete.html CLOSED TREE

dom/indexedDB/test/test_file_os_delete.html

@@ -62,9 +62,13 @@
       is(event.type, "success", "Got correct event type");
 
       getCurrentUsage(grabFileUsageAndContinueHandler);
-      let usage = yield undefined;
+      let originalUsage = yield undefined;
 
-      is(usage, startUsage + fileData1.obj.file.size + fileData2.obj.file.size,
+      // FIXME This might not work in private browsing mode because of the
+      // encryption overhead. We need to decide how to handle that. We might
+      // change the usage reporting to remove the overhead.
+
+      is(originalUsage, startUsage + fileData1.obj.file.size + fileData2.obj.file.size,
          "Correct file usage");
 
       let trans = db.transaction([objectStoreName], READ_WRITE);
@@ -75,10 +79,9 @@
       is(event.type, "complete", "Got correct event type");
 
       getCurrentUsage(grabFileUsageAndContinueHandler);
-      usage = yield undefined;
+      let usage = yield undefined;
 
-      is(usage, startUsage + fileData1.obj.file.size + fileData2.obj.file.size,
-         "OS files exists");
+      is(usage, originalUsage, "OS files exists");
 
       fileData1.obj.file = null;
       fileData2.obj.file = null;