MD WebUI: create a Chrome-only <paper-ripple> that's resistant to JS jank (via web animations API)

ui/file_manager/file_manager/foreground/elements/compiled_resources2.gyp

 # Copyright 2016 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.
 {
   'targets': [
     {
       'target_name': 'files_icon_button',
       'dependencies': [
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/iron-behaviors/compiled_resources2.gyp:iron-button-state-extracted',
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/iron-behaviors/compiled_resources2.gyp:iron-control-state-extracted',
@@ skipping 11 matching lines @@
     {
       'target_name': 'files_quick_view',
       'dependencies': [
         'files_metadata_box',
       ],
       'includes': ['../../../compile_js2.gypi'],
     },
     {
       'target_name': 'files_ripple',
       'dependencies': [
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/paper-ripple/compiled_resources2.gyp:paper-ripple-extracted',

[oka, 2017/02/23 06:40:43]

Could you remove this line?

[oka, 2017/02/23 06:41:30]

(I've locally confirmed that code compiles after this line is removed.)

[Dan Beam, 2017/02/23 20:01:15]

Done.

         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
+        '<(EXTERNS_GYP):web_animations',
       ],
       'includes': ['../../../compile_js2.gypi'],
     },
     {
       'target_name': 'files_safe_media',
       'includes': ['../../../compile_js2.gypi'],
     },
     {
       'target_name': 'files_safe_media_webview_content',
       'includes': ['../../../compile_js2.gypi'],
@@ skipping 11 matching lines @@
         '<(EXTERNS_GYP):web_animations',
       ],
       'includes': ['../../../compile_js2.gypi'],
     },
     {
       'target_name': 'files_tooltip',
       'includes': ['../../../compile_js2.gypi'],
     },
   ],
 }