Turn on verbose flag for compiling file_manager.

ui/file_manager/audio_player/js/compiled_resources.gyp

Index: ui/file_manager/audio_player/js/compiled_resources.gyp
diff --git a/ui/file_manager/audio_player/js/compiled_resources.gyp b/ui/file_manager/audio_player/js/compiled_resources.gyp
index 3817183714183a752f22490351a665c9201db5b2..a1bb7c1097545259bdf296e07df2f05b44119e4d 100644
--- a/ui/file_manager/audio_player/js/compiled_resources.gyp
+++ b/ui/file_manager/audio_player/js/compiled_resources.gyp
@@ -40,6 +40,9 @@
           '../../externs/es6_workaround.js',
           '../../externs/platform.js',
         ],
+        'closure_args': [
+          'warning_level=VERBOSE'
+        ]
       },
       'includes': [
         '../../../../third_party/closure_compiler/compile_js.gypi'
@@ -92,6 +95,9 @@
           '../../externs/files_elements.js',
           '../../externs/platform.js',
         ],
+        'closure_args': [
+          'warning_level=VERBOSE'
+        ]

[yawano, 2015/10/15 11:26:43]

Small nit: In gyp file, we add "," even if it's last element. Please also check
other gyp files.

[fukino, 2015/10/15 11:45:40]

Done.

       },
       'includes': [
         '../../../../third_party/closure_compiler/compile_js.gypi'