Add a flag to the compiler for compiling polymer code.

third_party/closure_compiler/compiled_resources.gyp

 # Copyright 2014 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.
 #
 # Add your directory-specific .gyp file to this list for it to be continuously
 # typechecked on the builder:
 # http://build.chromium.org/p/chromium.fyi/builders/Closure%20Compilation%20Linux
 #
 # Also, see our guide to Closure compilation in chrome:
 # https://code.google.com/p/chromium/wiki/ClosureCompilation
@@ skipping 14 matching lines @@
         '../../chrome/browser/resources/options/compiled_resources.gyp:*',
         '../../chrome/browser/resources/ntp4/compiled_resources.gyp:*',
         '../../chrome/browser/resources/uber/compiled_resources.gyp:*',
         '../../ui/file_manager/audio_player/js/compiled_resources.gyp:*',
         '../../ui/file_manager/file_manager/background/js/compiled_resources.gyp:*',
         '../../ui/file_manager/file_manager/foreground/js/compiled_resources.gyp:*',
         '../../ui/file_manager/file_manager/foreground/js/metadata/compiled_resources.gyp:*',
         '../../ui/file_manager/gallery/js/compiled_resources.gyp:*',
         '../../ui/file_manager/image_loader/compiled_resources.gyp:*',
         '../../ui/file_manager/video_player/js/compiled_resources.gyp:*',
+        '../../ui/webui/resources/cr_elements/v0_8/cr_checkbox/compiled_resources.gyp:*',
         '../../ui/webui/resources/js/chromeos/compiled_resources.gyp:*',
         '../../ui/webui/resources/js/chromeos/compiled_resources.gyp:*',
         '../../ui/webui/resources/js/compiled_resources.gyp:*',
         '../../ui/webui/resources/js/cr/ui/compiled_resources.gyp:*',
       ],
       'includes': [
         '../../remoting/remoting_webapp_compile.gypi',
       ],
     },
   ]
 }