Media player: Add shortcut keys (Ctrl+Shift+I/J/C/B) to media players for debug.

ui/file_manager/audio_player/js/audio_player.js

 // Copyright (c) 2012 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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
@@ skipping 49 matching lines @@
       this.errorString_ = strings['AUDIO_ERROR'];
       this.offlineString_ = strings['AUDIO_OFFLINE'];
       AudioPlayer.TrackInfo.DEFAULT_ARTIST =
           strings['AUDIO_PLAYER_DEFAULT_ARTIST'];
     }.bind(this));
 
     this.volumeManager_.addEventListener('externally-unmounted',
         this.onExternallyUnmounted_.bind(this));
 
     window.addEventListener('resize', this.onResize_.bind(this));
+    document.addEventListener('keydown', this.onKeyDown_.bind(this));
 
     // Show the window after DOM is processed.
     var currentWindow = chrome.app.window.current();
     if (currentWindow)
       setTimeout(currentWindow.show.bind(currentWindow), 0);
   }.bind(this), 0);
 }
 
 /**
  * Initial load method (static).
@@ skipping 204 matching lines @@
       window.innerHeight >= AudioPlayer.EXPANDED_MODE_MIN_HEIGHT) {
     this.isExpanded_ = true;
     this.model_.expanded = true;
   } else if (this.isExpanded_ &&
              window.innerHeight < AudioPlayer.EXPANDED_MODE_MIN_HEIGHT) {
     this.isExpanded_ = false;
     this.model_.expanded = false;
   }
 };
 
+/**
+ * Handles keydown event to open inspector with shortcut keys.
+ *
+ * @param {Event} event KeyDown event.
+ * @private
+ */
+AudioPlayer.prototype.onKeyDown_ = function(event) {
+  switch (util.getKeyModifiers(event) + event.keyIdentifier) {
+    // Handle debug shortcut keys.
+    case 'Ctrl-Shift-U+0049': // Ctrl+Shift+I
+      chrome.fileManagerPrivate.openInspector('normal');
+      break;
+    case 'Ctrl-Shift-U+004A': // Ctrl+Shift+J
+      chrome.fileManagerPrivate.openInspector('console');
+      break;
+    case 'Ctrl-Shift-U+0043': // Ctrl+Shift+C
+      chrome.fileManagerPrivate.openInspector('element');
+      break;
+    case 'Ctrl-Shift-U+0042': // Ctrl+Shift+B
+      chrome.fileManagerPrivate.openInspector('background');
+      break;
+  }
+};
+
 /* Keep the below constants in sync with the CSS. */
 
 /**
  * Window header size in pixels.
  * @type {number}
  * @const
  */
 AudioPlayer.HEADER_HEIGHT = 33;  // 32px + border 1px
 
 /**
@@ skipping 123 matching lines @@
   // TODO(yoshiki): Handle error in better way.
   // TODO(yoshiki): implement artwork (metadata.thumbnail)
   this.title = metadata.mediaTitle || this.getDefaultTitle();
   this.artist = error || metadata.mediaArtist || this.getDefaultArtist();
 };
 
 // Starts loading the audio player.
 window.addEventListener('polymer-ready', function(e) {
   AudioPlayer.load();
 });