This adds a webui overlay on the extensions page for showing what Extension keybindings are active.…

chrome/browser/resources/extensions/extensions.css

 /* 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. */
 
 html.loading * {
   -webkit-transition-duration: 0 !important;
 }
 
 /* Developer mode */
 
@@ skipping 46 matching lines @@
 }
 
 #no-extensions-message {
   font-weight: bold;
 }
 
 #suggest-gallery {
   -webkit-padding-start: 10px;
 }
 
-#get-more-extensions {
+#footer-section {
   background: url('chrome://theme/IDR_WEBSTORE_ICON_32') no-repeat left center;
   font-size: 1.25em;
 }
 
-#get-more-extensions > a {
+#footer-section > a {
   -webkit-margin-start: 42px;
   line-height: 32px;
 }
 
 .empty-extension-list {
   height: 3em;
 }
 
 .loading #no-extensions,
-.loading #get-more-extensions,
+.loading #footer-section,
 #extension-settings-list:not(.empty-extension-list) ~ #no-extensions,
-.empty-extension-list ~ #get-more-extensions {
+.empty-extension-list ~ #footer-section {
   display: none;
 }
 
 .extension-list-item-wrapper {
   margin: 23px 0;
 }
 
 .extension-list-item {
   background-repeat: no-repeat;
   display: -webkit-box;
@@ skipping 92 matching lines @@
 .install-warnings ul {
   margin: 0;
 }
 
 #font-measuring-div {
   /* Remove from the flow and hide. */
   position: absolute;
   visibility: hidden;
 }
 
+.extension-commands-config {
+  float: right;
+}
+
 /* Overlays */
 
 #overlay {
   z-index: 5;
 }
 
 #overlay .page:not(.showing) {
   display: none;
 }
 
@@ skipping 24 matching lines @@
   right: auto;
 }
 
 .extension-list-item:not(:hover) .trash:not(:focus) {
   opacity: 0;
 }
 
 .extension-list-item-wrapper.may-not-disable .trash {
   visibility: hidden;
 }