AudioPlayer: Update control panel with playback progress bar.

ui/file_manager/audio_player/elements/control_panel.html

 <!--
   -- 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.
   -->
 
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/font-roboto/roboto.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-slider/paper-slider.html">
 <link rel="import" href="volume_controller.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="control-panel">
   <link rel="import" type="css" href="control_panel.css">
   <template>
     <div class="controls">
-      <div class="upper-controls time-controls">
-        <div class="time media-control">
-          <div class="current">[[time2string_(time)]]</div>
-        </div>
-        <div class="progress media-control custom-slider">
-          <input id="timeInput" name="timeInput" type="range" touch-action="manipulation"
-                 min="0" max="[[duration]]" value="{{time::input}}">
-          <div class="bar">
-            <div class="filled" style$="[[computeProgressBarStyle_(time, duration)]]"></div>
-            <div class="cap left"></div>
-            <div class="cap right"></div>
-          </div>
-        </div>
-        <div class="time media-control">
-          <div class="duration">[[time2string_(duration)]]</div>
-        </div>
-      </div>
-      <div class="lower-controls audio-controls">
+      <div class="upper-controls audio-controls">
         <!-- Shuffle toggle button in the bottom line. -->
         <button class="shuffle-mode media-button toggle" state="default">
           <label>
             <input id="shuffleCheckbox"
                    type="checkbox"
                    checked="{{shuffle::change}}">
             <span class="icon"></span>
           </label>
           <files-toggle-ripple activated="[[shuffle]]"></files-toggle-ripple>
         </button>
@@ skipping 63 matching lines @@
         <button id="playlistButton"
                 class="playlist media-button toggle"
                 state="default">
           <label>
             <input type="checkbox" checked="{{expanded::change}}">
             <span class="icon"></span>
           </label>
           <files-toggle-ripple activated="[[expanded]]"></files-toggle-ripple>
         </button>
       </div>
+      <div class="lower-controls time-controls">
+        <div class="time media-control">[[computeTimeString_(time, duration)]]</div>

[yawano, 2015/10/30 01:59:53]

Don't you need to put an invisible element to prevent layout change while music
is playing?
i.e. If it goes to 10:00 from 9:59, the slider becomes shorter if you don't have
an invisible element.

[fukino, 2015/10/30 04:25:53]

Thank you for the good catch!
I inserted invisible element to ensure the width fixed.

+        <paper-slider id="timeSlider" max="[[duration]]" value="{{time::change}}"></paper-slider>
+      </div>
     </div>
   </template>
 </dom-module>
 
 <script src="control_panel.js"></script>