Audio Player: Update Polymer to the latest version (0.3.4)

The Polymer which Audio Player currently used is outdated. This patch uprev it to the latest version (currently 0.3.4).

BUG=397520
TEST=manualy tested
R=hirono@chromium.org

Review URL: https://codereview.chromium.org/444223003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287999 0039d316-1c4b-4281-b951-d872f2087c98

ui/file_manager/file_manager/audio_player.html

@@ -26,8 +26,8 @@
     <script src="../../../../ui/webui/resources/js/cr/ui/array_data_model.js">
     </script>
 
-    <script src="../../../../third_party/polymer_legacy/platform/platform.js"></script>
-    <script src="../../../../third_party/polymer_legacy/polymer/polymer.js"></script>
+    <script src="../../../../third_party/polymer/platform/platform.js"></script>
+    <script src="../../../../third_party/polymer/polymer/polymer.js"></script>
 
     <script src="common/js/async_util.js"></script>
     <script src="common/js/util.js"></script>
@@ -186,7 +186,7 @@
 
   <!-- Definition of <audio-player> tag. -->
   <polymer-element name="audio-player"
-                   attributes="tracks playing currenttrackurl playcount">
+                   attributes="playing currenttrackurl playcount">
     <template>
       <link rel="stylesheet"
             href="audio_player/elements/audio_player.css"></link>

ui/file_manager/file_manager/audio_player/js/audio_player_scripts.js

@@ -16,8 +16,8 @@ if (!('allowsEval' in document.securityPolicy))
 // Force Polymer into dirty-checking mode, see http://crbug.com/351967
 Object['observe'] = undefined;
 
-<include src="../../../../../third_party/polymer_legacy/platform/platform.js">
-<include src="../../../../../third_party/polymer_legacy/polymer/polymer.js">
+<include src="../../../../../third_party/polymer/platform/platform.js">
+<include src="../../../../../third_party/polymer/polymer/polymer.js">
 
 (function() {