Separate the audio player app from Files.app

ui/file_manager/audio_player/manifest.json

 {
-  // chrome-extension://jcgeabjmjgoblfofpppfkcoakmfobdko/
-  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw0/gRbJc545iEGRZs20Rl/HtrSUp8H3gJd4Y6hCe0CG1xQiJhZ5nc8qZyxa96gMxRAKBq54S6sjVVtV6uS70oU6FvrvwItByYkkqr4ZE7eMJKwMqnGItxWbh6KBodf89lpKoIy6MtYTqubBhXB/IQBZsXah90tXwRzaaJNWw+2BBRIhcPsH3ng+wgN7rwFxo4HIv9ZpqkYlx90rwkfjOmKPPnSXyXFIBJfmqfdbd8PLtcxzzOTE+vxwoXZuYWrthKm4uKfNqXIYns74sSJlqyKfctuR+nQdNh8uePv0e+/Ul3wER1/jIXULLjfyoaklyDs+ak3SDf+xWScJ+0LJ0AwIDAQAB",
+  // chrome-extension://cjbfomnbifhcdnihkgipgfcihmgjfhbf/
+  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsU2jLo1oiASjXO+/+qYfgojW4Y5TCIBNFzcAdxaF78BRteygWkJqbUVyGZxtSk/RDe3NdNyQCxsyU1YfYXZQvGRNDwKw5tzGyE4dcedveipaJW174VGd3GViS0WWist3HRxfYRZvRP5E8l/4NxXB0+crfq2WolO8La25js1QkCsggQ1lC8g24NRrPnTAWZxvSD6L64R0UoVoe68HdC4mRISe9/OqjyiAfb4Ajgooq8dyzkV8AJTKRjFTmYPlcc5Ba21rXzRt22TnDh2U38m/OEvTu69cyTIxAkBjUa/2gu7N588k9XzaMhTjiolSWxBDQuLZRp8fNjO0R27jouo3FwIDAQAB",
   "manifest_version": 2,
-  "name": "Video Player",
+  "name": "Audio Player",
   "version": "1.0",
-  "description": "Video Player",
+  "description": "Audio Player",
   "display_in_launcher": false,
   "incognito" : "split",
   "icons": {
-    "16": "images/icon/video-player-favicon-16.png",
-    "32": "images/icon/video-player-32.png",
-    "48": "images/icon/video-player-48.png",
-    "64": "images/icon/video-player-64.png",
-    "96": "images/icon/video-player-96.png",
-    "128": "images/icon/video-player-128.png",
-    "256": "images/icon/video-player-256.png"
+    "16": "icons/audio-player-favicon-16.png",
+    "32": "icons/audio-player-32.png",
+    "48": "icons/audio-player-48.png",
+    "64": "icons/audio-player-64.png",
+    "96": "icons/audio-player-96.png",
+    "128": "icons/audio-player-128.png",
+    "256": "icons/audio-player-256.png"
   },
   "permissions": [
     "commandLinePrivate",
     "fileSystem",
     "fileBrowserHandler",
     "fileManagerPrivate",
     "fullscreen",
     "mediaPlayerPrivate",
     "power",
     "storage",
     "chrome://resources/",
     "chrome://theme/"
   ],
   "file_handlers": {
-    "video": {
+    "audio": {
       "types": [
-        "video/*"
+        "audio/*"
       ],
       "extensions": [
-        "3gp",
-        "avi",
-        "m4v",
-        "mkv",
-        "mov",
-        "mp4",
-        "mpeg",
-        "mpeg4",
-        "mpg",
-        "mpg4",
-        "ogm",
-        "ogv",
-        "ogx",
-        "webm"
+        "amr",
+        "flac",
+        "m4a",
+        "mp3",
+        "oga",
+        "ogg",
+        "wav"
       ]
     }
   },
-  "import": [
-    // Google Cast API extension
-    {
-      "id": "mafeflapfdfljijmlienjedomfjfmhpd",
-      "minimum_version":  "14.507.0.31276"
-    }
-  ],
   "app": {
     "background": {
       "scripts": [
         "chrome://resources/js/cr.js",
         "chrome://resources/js/cr/event_target.js",
         "chrome://resources/js/cr/ui/array_data_model.js",
         "chrome://resources/js/load_time_data.js",
         "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/util.js",
         "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/async_util.js",
         "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/volume_manager_common.js",
+        "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/background/js/app_window_wrapper.js",
+        "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/background/js/background_base.js",
+        "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/background/js/test_util.js",
         "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/background/js/volume_manager.js",
         "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/foreground/js/file_type.js",
-        "js/error_util.js",
-        "js/test_util.js",
         // The main background script must be at the end.
         "js/background.js"
       ]
     },
-    // The following ids are cast extension's ids .
-    // - boadgeojelhgndaghljhdicfkmllpafd (release)
-    // - dliochdbjfkdbacpmhlcpmleaejidimm (beta)
-    // - hfaagokkkhdbgiakmmlclaapfelnkoah
-    // - fmfcbgogabcbclcofgocippekhfcmgfj
-    // - enhhojjnijigcajfphajepfemndkmdlo
     "content_security_policy": "default-src 'none'; script-src 'self' chrome://resources chrome-extension://boadgeojelhgndaghljhdicfkmllpafd chrome-extension://dliochdbjfkdbacpmhlcpmleaejidimm chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj chrome-extension://fmfcbgogabcbclcofgocippekhfcmgfj chrome-extension://enhhojjnijigcajfphajepfemndkmdlo; style-src 'self' chrome://resources 'unsafe-inline'; img-src 'self' chrome://theme chrome://resources data: https://www.googledrive.com; media-src 'self'; object-src 'self'"
   }
 }