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

Index: ui/file_manager/audio_player/js/audio_player.js
diff --git a/ui/file_manager/audio_player/js/audio_player.js b/ui/file_manager/audio_player/js/audio_player.js
index a00929193a904480abad9b7a9b6579a9ed8576f7..1646ff1a135ab8395234f4aed7f98fceea8b38f0 100644
--- a/ui/file_manager/audio_player/js/audio_player.js
+++ b/ui/file_manager/audio_player/js/audio_player.js
@@ -67,6 +67,7 @@ function AudioPlayer(container) {
         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();
@@ -291,6 +292,30 @@ AudioPlayer.prototype.onResize_ = function(event) {
   }
 };
 
+/**
+ * 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. */
 
 /**