Modify extension omnibox keywords to be user-configurable

chrome/browser/resources/options/search_engine_manager.js

Index: chrome/browser/resources/options/search_engine_manager.js
diff --git a/chrome/browser/resources/options/search_engine_manager.js b/chrome/browser/resources/options/search_engine_manager.js
index dc5cf25179fc4c18c7f1b0eed2fc0c2dfc663a46..b0fd73229b4bc2e24d1e6e50dbdde7eb7cd91e65 100644
--- a/chrome/browser/resources/options/search_engine_manager.js
+++ b/chrome/browser/resources/options/search_engine_manager.js
@@ -37,7 +37,20 @@ cr.define('options', function() {
     /**
      * List for extension keywords.
      * @private
-    extensionList_ : null,
+     */
+    extensionList_: null,
+
+    get defaultsList() {
+      return this.defaultsList_;
+    },
+
+    get othersList() {
+      return this.othersList_;
+    },
+
+    get extensionList() {
+      return this.extensionList_;
+    },
 
     /** inheritDoc */
     initializePage: function() {
@@ -112,11 +125,12 @@ cr.define('options', function() {
   };
 
   SearchEngineManager.validityCheckCallback = function(validity, modelIndex) {
-    // Forward to both lists; the one without a matching modelIndex will ignore
-    // it.
-    SearchEngineManager.getInstance().defaultsList_.validationComplete(
+    // Forward to all lists; those without a matching modelIndex will ignore it.
+    SearchEngineManager.getInstance().defaultsList.validationComplete(
+        validity, modelIndex);
+    SearchEngineManager.getInstance().othersList.validationComplete(
         validity, modelIndex);
-    SearchEngineManager.getInstance().othersList_.validationComplete(
+    SearchEngineManager.getInstance().extensionList.validationComplete(
         validity, modelIndex);
   };