Turn on verbose flag for compiling file_manager.

ui/file_manager/compile_js.gypi

Index: ui/file_manager/compile_js.gypi
diff --git a/testing/legion/examples/http_example/http_test.isolate b/ui/file_manager/compile_js.gypi
similarity index 55%
copy from testing/legion/examples/http_example/http_test.isolate
copy to ui/file_manager/compile_js.gypi
index 605551bf0740989d6b2d51ab5be8aa386bc6a52b..f82d56ee6d440964371d4f3f854df81a989db466 100644
--- a/testing/legion/examples/http_example/http_test.isolate
+++ b/ui/file_manager/compile_js.gypi
@@ -1,18 +1,11 @@
 # Copyright 2015 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.
-
 {
-  'includes': [
-    '../../../legion/legion.isolate'
-  ],
   'variables': {
-    'command': [
-      'python',
-      'http_test.py',
-    ],
-    'files': [
-      'http_test.py',
+    'closure_args': [
+      'warning_level=VERBOSE',
     ],
   },
+  'includes': ['../../third_party/closure_compiler/compile_js.gypi'],
 }