Bookmark manager: Handle "copy", "cut"and "paste" events only when list or tree pane active.

chrome/browser/resources/bookmark_manager/js/main.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.
 
 (function() {
 /** @const */ var BookmarkList = bmm.BookmarkList;
 /** @const */ var BookmarkTree = bmm.BookmarkTree;
 /** @const */ var Command = cr.ui.Command;
 /** @const */ var CommandBinding = cr.ui.CommandBinding;
 /** @const */ var LinkKind = cr.LinkKind;
@@ skipping 1679 matching lines @@
       undoDelete();
       break;
   }
 }
 
 // Execute the copy, cut and paste commands when those events are dispatched by
 // the browser. This allows us to rely on the browser to handle the keyboard
 // shortcuts for these commands.
 function installEventHandlerForCommand(eventName, commandId) {
   function handle(e) {
+    if (document.activeElement != list || document.activeElement != tree)
+      return;
     var command = $(commandId);
     if (!command.disabled) {
       command.execute();
       if (e)
         e.preventDefault();  // Prevent the system beep.
     }
   }
   if (eventName == 'paste') {
     // Paste is a bit special since we need to do an async call to see if we
     // can paste because the paste command might not be up to date.
@@ skipping 102 matching lines @@
   });
 
   initializeSplitter();
   bmm.addBookmarkModelListeners();
   dnd.init();
   tree.reload();
 }
 
 initializeBookmarkManager();
 })();