Improve messaging for shared modules on chrome://extensions

chrome/browser/resources/extensions/extension_list.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.
 
 <include src="extension_error.js"></include>
 
 cr.define('options', function() {
   'use strict';
 
   /**
@@ skipping 67 matching lines @@
      */
     createNode_: function(extension) {
       var template = $('template-collection').querySelector(
           '.extension-list-item-wrapper');
       var node = template.cloneNode(true);
       node.id = extension.id;
 
       if (!extension.enabled || extension.terminated)
         node.classList.add('inactive-extension');
 
-      if (extension.managedInstall) {
+      if (extension.managedInstall ||
+          extension.dependentExtensions.length > 0) {
         node.classList.add('may-not-modify');
         node.classList.add('may-not-remove');
       } else if (extension.suspiciousInstall || extension.corruptInstall) {
         node.classList.add('may-not-modify');
       }
 
       var idToHighlight = this.getIdQueryParam_();
       if (node.id == idToHighlight)
         node.classList.add('extension-highlight');
 
@@ skipping 130 matching lines @@
             chrome.send('extensionSettingsLaunch', [extension.id]);
           });
           launch.hidden = false;
         }
       }
 
       if (!extension.terminated) {
         // The 'Enabled' checkbox.
         var enable = node.querySelector('.enable-checkbox');
         enable.hidden = false;
-        var managedOrHosedExtension = extension.managedInstall ||
-                                      extension.suspiciousInstall ||
-                                      extension.corruptInstall;
-        enable.querySelector('input').disabled = managedOrHosedExtension;
+        var enableCheckboxDisabled = extension.managedInstall ||
+                                     extension.suspiciousInstall ||
+                                     extension.corruptInstall ||
+                                     extension.dependentExtensions.length > 0;
+        enable.querySelector('input').disabled = enableCheckboxDisabled;
 
-        if (!managedOrHosedExtension) {
+        if (!enableCheckboxDisabled) {
           enable.addEventListener('click', function(e) {
             // When e.target is the label instead of the checkbox, it doesn't
             // have the checked property and the state of the checkbox is
             // left unchanged.
             var checked = e.target.checked;
             if (checked == undefined)
               checked = !e.currentTarget.querySelector('input').checked;
             chrome.send('extensionSettingsEnable',
                         [extension.id, checked ? 'true' : 'false']);
 
@@ skipping 50 matching lines @@
         if (extension.suspiciousInstall) {
           // Then the 'This isn't from the webstore, looks suspicious' message.
           node.querySelector('.suspicious-install-message').hidden = false;
         }
         if (extension.corruptInstall) {
           // Then the 'This is a corrupt extension' message.
           node.querySelector('.corrupt-install-message').hidden = false;
         }
       }
 
+      if (extension.dependentExtensions.length > 0) {
+        var dependentMessage =
+            node.querySelector('.dependent-extensions-message');
+        dependentMessage.hidden = false;
+        var dependentList = dependentMessage.querySelector('ul');
+        extension.dependentExtensions.forEach(function(id) {
+          var li = document.createElement('li');
+          li.innerText = id;
+          dependentList.appendChild(li);
+        });
+      }
+
       // Then active views.
       if (extension.views.length > 0) {
         var activeViews = node.querySelector('.active-views');
         activeViews.hidden = false;
         var link = activeViews.querySelector('a');
 
         extension.views.forEach(function(view, i) {
           var displayName = view.generatedBackgroundPage ?
               loadTimeData.getString('backgroundPage') : view.path;
           var label = displayName +
@@ skipping 65 matching lines @@
           topScroll -= pad / 2;
         setScrollTopForDocument(document, topScroll);
       }
     },
   };
 
   return {
     ExtensionsList: ExtensionsList
   };
 });