Revert of Fix accessibility issues in AudioPlayer and VideoPlayer.

ui/file_manager/file_manager/foreground/elements/files_icon_button.html

Index: ui/file_manager/file_manager/foreground/elements/files_icon_button.html
diff --git a/ui/file_manager/file_manager/foreground/elements/files_icon_button.html b/ui/file_manager/file_manager/foreground/elements/files_icon_button.html
deleted file mode 100644
index f6113e3dcceb12c4f251508658d12bbf5193043c..0000000000000000000000000000000000000000
--- a/ui/file_manager/file_manager/foreground/elements/files_icon_button.html
+++ /dev/null
@@ -1,61 +0,0 @@
-<!-- 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.
-  -->
-
-<!--
-  `files-icon-button` implements common behaviors among icon buttons in file
-  manager, video player, and audio player.
-  If the button has |toggles| attributes, this element uses files-toggle-ripple
-  to indicate the active state. Otherwise, this element uses files-ripple to
-  show circle burst on click.
-  In addition, this element shows outline only when it is focused by keyboard
-  operation.
--->
-
-<link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-behaviors/iron-button-state.html">
-<link rel="import" href="chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/foreground/elements/files_ripple.html">
-<link rel="import" href="chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/foreground/elements/files_toggle_ripple.html">
-
-<dom-module id="files-icon-button">
-  <template>
-    <style>
-      :host {
-        background-position: center;
-        background-repeat: no-repeat;
-        border-radius: 2px;
-        cursor: pointer;
-        display: inline-block;
-        height: 32px;
-        outline: none;  /* We use original outline for focused state. */
-        position: relative;
-        width: 32px;
-      }
-
-      :host(.keyboard-focus) {
-        /* We use box-shadow rather than outline to make it rounded. */
-        box-shadow: 0 0 0 1px rgba(66, 133, 244, 0.5);
-      }
-
-      files-toggle-ripple {
-        height: 28px;
-        left: 2px;
-        pointer-events: none;
-        position: absolute;
-        top: 2px;
-        width: 28px;
-      }
-
-      files-toggle-ripple::shadow .ripple.activated {
-        opacity: 0.1;
-      }
-    </style>
-
-    <files-ripple hidden="[[toggles]]"></files-ripple>
-    <files-toggle-ripple activated="[[active]]"></files-toggle-ripple>
-    <!-- TODO(fukino): Make it possible to insert user-defined element to show them on top of ripple effect. -->
-  </template>
-
-  <script src="files_icon_button.js"></script>
-</dom-module>