Pressing 'Delete' key in bookmark manager's search box deletes bookmark.

chrome/browser/resources/bookmark_manager/js/main.js

Index: chrome/browser/resources/bookmark_manager/js/main.js
diff --git a/chrome/browser/resources/bookmark_manager/js/main.js b/chrome/browser/resources/bookmark_manager/js/main.js
index acfc3d7db701566ae61ea65a88c2c33d5ebf04f4..84f06a9e80931df87989636c294c652dbd2ae40f 100644
--- a/chrome/browser/resources/bookmark_manager/js/main.js
+++ b/chrome/browser/resources/bookmark_manager/js/main.js
@@ -470,6 +470,20 @@ function updatePasteCommand(opt_f) {
   });
 }
 
+function handleCanExecuteForSearchBox(e) {
+  var command = e.command;
+  switch (command.id) {
+    case 'delete-command':
+    case 'undo-command':
+      // Do nothing when delete is selected in search box.
+      // Pass the undo command through (fixes http://crbug.com/278112).
+      // Otherwise, because the global undo command has no visible UI, always

[Bernhard Bauer, 2015/04/15 14:54:45]

Remove this sentence (see my comment above).

[Deepak, 2015/04/15 15:04:15]

Done.

+      // enable it, and just make it a no-op if undo is not possible.
+      e.canExecute = false;
+      break;
+  }
+}
+
 function handleCanExecuteForDocument(e) {
   var command = e.command;
   switch (command.id) {
@@ -488,14 +502,6 @@ function handleCanExecuteForDocument(e) {
           !isUnmodifiable(bmm.tree.getBookmarkNodeById(bmm.list.parentId));
       break;
 
-    case 'undo-command':
-      // If the search box is active, pass the undo command through
-      // (fixes http://crbug.com/278112). Otherwise, because
-      // the global undo command has no visible UI, always enable it, and
-      // just make it a no-op if undo is not possible.
-      e.canExecute = e.currentTarget.activeElement !== $('term');

[Bernhard Bauer, 2015/04/15 14:54:45]

For the undo command we need to keep the behavior if the search field is _not_
selected. Thanks to the way events are propagated, this only gets invoked if the
search field handler did not set canExecute, so you know that the search field
is not selected, so you can set it unconditionally to true. You can also keep
the second part of the comment (everything after "Otherwise").

[Deepak, 2015/04/15 15:04:14]

Done.

-      break;
-
     default:
       canExecuteForList(e);
       if (!e.defaultPrevented)
@@ -1464,6 +1470,7 @@ function continueInitializeBookmarkManager(localizedStrings) {
   });
 
   $('term').addEventListener('search', handleSearch);
+  $('term').addEventListener('canExecute', handleCanExecuteForSearchBox);
 
   $('folders-button').addEventListener('click', handleMenuButtonClicked);
   $('organize-button').addEventListener('click', handleMenuButtonClicked);