Turn on verbose flag for compiling file_manager.

ui/file_manager/compile_js.gypi

Index: ui/file_manager/compile_js.gypi
diff --git a/ui/file_manager/compile_js.gypi b/ui/file_manager/compile_js.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..e792f6c074ef56ce93a90681cccc11c4131eb770
--- /dev/null
+++ b/ui/file_manager/compile_js.gypi
@@ -0,0 +1,19 @@
+# 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.
+{
+  'variables': {
+    'externs': [
+      '<(EXTERNS_DIR)/chrome_extensions.js',
+      '<(EXTERNS_DIR)/chrome_send.js',
+      '<(EXTERNS_DIR)/command_line_private.js',
+      '<(EXTERNS_DIR)/file_manager_private.js',
+      '<(EXTERNS_DIR)/media_player_private.js',
+      '<(EXTERNS_DIR)/metrics_private.js',

[Dan Beam, 2015/10/19 16:10:28]

is this common to ALL compiled_resources.gyp files in ui/file_manager? it
doesn't seem like it

[fukino, 2015/10/20 04:13:07]

Actually, none of these externs are not common.
I listed minimum set of externs in each compiled_resources.js

+    ],
+    'closure_args': [
+      'warning_level=VERBOSE',
+    ],
+  },
+  'includes': ['../../third_party/closure_compiler/compile_js.gypi'],
+}