[Extensions] Sprinkle in some more null protos and defineProperty's

extensions/renderer/resources/binding.js

Index: extensions/renderer/resources/binding.js
diff --git a/extensions/renderer/resources/binding.js b/extensions/renderer/resources/binding.js
index 13ac7f960ccd89e28d61d7e52ca65baded2c8451..888dd0642f4c2520ef70ec73f6eaf02aff9b9d74 100644
--- a/extensions/renderer/resources/binding.js
+++ b/extensions/renderer/resources/binding.js
@@ -26,11 +26,15 @@ var sendRequest = sendRequestHandler.sendRequest;
 // modify their behaviour (such as a custom way to handle requests to the
 // API, a custom callback, etc).
 function APIFunctions(namespace) {
-  this.apiFunctions_ = {};
-  this.unavailableApiFunctions_ = {};
+  this.apiFunctions_ = { __proto__: null };
+  this.unavailableApiFunctions_ = { __proto__: null };
   this.namespace = namespace;
 }
 
+APIFunctions.prototype = {
+  __proto__: null,
+};
+
 APIFunctions.prototype.register = function(apiName, apiFunction) {
   this.apiFunctions_[apiName] = apiFunction;
 };
@@ -184,9 +188,13 @@ function Binding(apiName) {
   this.customHooks_ = [];
 };
 
-Binding.create = function(apiName) {
-  return new Binding(apiName);
-};
+$Object.defineProperty(Binding, 'create', {
+  __proto__: null,
+  configurable: false,
+  enumerable: false,
+  value: function(apiName) { return new Binding(apiName); },
+  writable: false,
+});
 
 Binding.prototype = {
   // Sneaky workaround for Object.prototype getters/setters - our prototype
@@ -376,12 +384,11 @@ Binding.prototype = {
           return;
         }
 
-        var apiFunction = {};
+        var apiFunction = { __proto__: null };
         apiFunction.definition = functionDef;
-        var apiFunctionName = schema.namespace + '.' + functionDef.name;
-        apiFunction.name = apiFunctionName;
+        apiFunction.name = schema.namespace + '.' + functionDef.name;
 
-        if (!GetAvailability(apiFunctionName).is_available ||
+        if (!GetAvailability(apiFunction.name).is_available ||
             (checkUnprivileged && !isSchemaAccessAllowed(functionDef))) {
           this.apiFunctions_.registerUnavailable(functionDef.name);
           return;